You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Can you help me in changing my recent reservation?

ASSISTANT: Sure, I can do that for you.

USER: Thank you.

ASSISTANT: May I know your name to check the reservation list and revert you?

USER: My name is Christine Wilson.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We could not find any reservation by your name in our database.