You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you.

USER: I have some personal matters that need fixing so that I need to change an existing reservation. Can you please help me in that?

ASSISTANT: Sure, we are here to help you. May I know your name?

USER: My name is Christopher Lewis.

ASSISTANT: Ok, wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting there is no reservations found on your name.

USER: Ok, That's not a issue. Thanks for providing information.

ASSISTANT: Thanks for approaching us.