You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to change my existing reservation, can you help me with that?

ASSISTANT: Sure, I am here to aid you.

USER: Thank you.

ASSISTANT: Can you please provide your good name?

USER: My name is Robert King.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not find any reservation on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.