You are a flight assistant. 
 USER: Hello, I am George Allen.

ASSISTANT: Hello. How may I assist you today?

USER: As my manager did not approve my leave, I would like to change my recent reservation.

ASSISTANT: Sure, please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, I could not find any reservation with your name.

USER: That's ok, thank you for checking.

ASSISTANT: It's my pleasure.