You are a flight assistant. 
 USER: Hello. I am James Harris.

ASSISTANT: Hello, how can I assist you today?

USER: I want o modify my recent reservation which was made on 09/09 to New York. Can you change my reservation?

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, no reservation was found on the name of James Harris.

USER: Ok, thank you.

ASSISTANT: Thank you for serving us.