You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I need to change my existing reservation.

ASSISTANT: Sure, may I know your good name?

USER: My name is Scott Edwards.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, Sorry to say that, there is no reservation was found with your name.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thanks for connecting with us.