You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I amend you?

USER: I want to change my reservation as my plan to visit Atlanta for hiking is cancelled. Will you help me in this?

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

USER: Sure, my name is Richard Thomas.

ASSISTANT: Ok, please wait for a few minutes.

USER: Sure.

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

USER: No problem, thanks for your effort.

ASSISTANT: Thank you for choosing us.