You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I would like to change my reservation which is under my name. can you please help me with that?

ASSISTANT: Sure, I am here to help you. May I know on which name the ticket has been reserved?

USER: Sure, my name is James Lee.

ASSISTANT: Ok, please wait a minute.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, sorry to inform no reservation found on your name.

USER: Ok, thank you for checking.

ASSISTANT: Thank you for opting us, have a good day.

USER: You are welcome.