Something like that:
[Felix, Adam, and Charlotte walk through the mall]
Charlotte: You know, you really didn’t have to come with me.
Felix: [covered in bags of candy] [cheeks stuffed with half-eaten candy] Yeah, but Mason said he’d pay for all my junk food if I switched babysitting times with him.
Charlotte: [glares at Felix] Uh-huh… [ignores him and turns to Adam] Anyway, how am I supposed to get you the perfect birthday gift of you’re right here, Adam?
Adam: By consulting with me before a purchase.
Charlotte: Aw, but where’s the surprise in that?
Adam: I don’t like surprises, and you rather fill my time with them already.
Charlotte: I…do?
Adam: Yes, every day I wake up and wonder where you’ll be that you shouldn’t.
Charlotte: [rolls eyes] Wow, between this and the babysitting, I feel so cared for.
Adam: Good. You do make it rather difficult, but it’s good to hear our efforts aren’t in vain.
Charlotte: [pouts] Make it difficult?
Adam: We’ve been here for four hours.
Charlotte: It’s a mall!
Adam: Yes, and it’s an enormous cesspool of danger. You’re surrounded by hundreds of people you’ve never met, might never identify, for hours on end; sight, sound, and smell are on constant attack—someone could come up behind you and you’d never even notice.
Charlotte: Oh, they would not!
Adam: And worst, you came here without telling anyone.
Charlotte: Because I was trying to get you a surprise birthday gift!
Adam: You’ve already given more than enough surprises today, please don’t consider anymore.
Charlotte: Fine, whatever. No surprises. So what would you like for you birthday? Come on, it can be anything.
[beat]
Adam: Peace of mind regarding your whereabouts.
Felix: [mouth scrunches up because of sour skittles] Oh! Maybe you can get a leash so she doesn’t wander off?
Charlotte: [super offended] I—!
Adam: No, she’d probably chew through that. Perhaps a tracking device?
Charlotte: [scoffs and walks faster to keep up with Adam] Um, excuse me but I am a detective, I don’t need a tracking device, and I sure as hell am on alert at all time— holy jeez!
[runs headfirst into Adam]
Salesperson: [laughs charmingly] Sorry to bother you sir, but I couldn’t help but overhear your need for a tracking device for your…dog?
Charlotte: Um—!
Adam: She is a bitch.
Felix: [laughs and chokes on his doritos]
Charlotte: [strangled, indignant noises]
Salesperson: Well, I represent a chip company that specializes in tracking devices for pets. [hands Adam a brochure]
Adam: [very seriously] Interesting.
Charlotte: Don’t you dare!
Adam: You did say you would get me anything for my birthday.
Charlotte: …you can’t be serious.
Adam: [stares unflinchingly at her] Deadly.
[later]
Nate: Happy birthday, Adam! [hands him a book with a ribbon on it]
Mason: I got you beer because I figured you’d need it after four hours at a mall.
Adam: [takes both] Thank you, I am grateful.
Felix: [enters carrying large bag and balloons] I got you highly reflective helium spheres, extra loud tissue paper, and a new scarf is buried somewhere underneath all the paper!
[Adam and Mason both groan]
Felix: [snickers] So, Charlotte, what did you get for Adam’s birthday?
Charlotte: [turns pink] I—uh…
Mason [sniffs and scrunches up his nose] I hope it wasn’t a dog, because you smell like one.
Charlotte: [holds her head in her hand]
Adam: [smiles and sips Mason’s gift] She gave me her gift earlier, no need to bother her.
Nate: Oh? What was it?
Felix: Yeah, Charlotte, tell us what you got Adam!
Charlotte: [sinks further in her seat] I am never going back to the mall.
Adam: Now that is a welcome birthday surprise. [claps her shoulder]
Charlotte: [winces in pain]