You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how  may I aid you?

USER: I am not feeling well to travel tomorrow so, please change my reservation to next week.

ASSISTANT: Sure, to change your reservation I need your name?

USER: Ok, Mary Gonzalez is my name.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no problem.

ASSISTANT: Thank you for availing us.

USER: Thanks for consulting us, have a nice day.