You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. May I know, what kind of service are you looking for?

USER: As I meet with a small injury so I want to change my travelling dates, can you please help me in changing my recent reservation?

ASSISTANT: Sure, I will help you in changing your ticket. To proceed for changing, we need your name. Can you provide it?

USER: I have reserved my flight ticket with the name Emma Miller.

ASSISTANT: Thanks for the name, Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thanks for your time. Sorry Emma, Unfortunately there is no active reservation on your name to change it.

USER: Not problem, I think I have made my reservation in other agency. Thank you for your effort.

ASSISTANT: Thanks for visiting us, Have a great day!.