You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Actually my Tennis competition is postponed, so that I want to change existing reservation. Can you help me?

ASSISTANT: Sure, may I know your name?

USER: Yes, I am Edward Davis.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: There was no active reservation on your name.

USER: Ok, not an problem. Thank you for your help.

ASSISTANT: Thank you for reaching us.