You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am Jerry Mitchell. Can you help me to change my reservation to next month?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name in our database to change.

USER: That is fine. Anyway, thank you for your time.

ASSISTANT: You are welcome.