You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER: I am James Thompson, can you change reservation which I did recently?

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Sorry James, there is no reservation found on your name.

USER: That's ok, not a problem.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: Thank you for helping me.

ASSISTANT: You are welcome.