You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Stephen Young here.

ASSISTANT: How may I help you?

USER: Can you please help me out in changing my existing reservation? As I'm not feeling well to do journeys right now.

ASSISTANT: Ok, I will help you with that and change your reservation.

USER: Ok.

ASSISTANT: Please wait a moment while I check and let you know that status.

USER: Sure, I'll wait for your response.

ASSISTANT: Sorry Stephen Young, I did not find your reservation in our records of the reservation.

USER: Oh! May be I did a wrong booking. Thank you for giving the information anyways.

ASSISTANT: Thank you for choosing our agency.