You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: I would like to change my reservation as my friends changed plan.

ASSISTANT: Sure, please may I know your name?

USER: Myself Robert Perez.

ASSISTANT: There is no reservation on your name, Robert.

USER: That's ok, no issues.

ASSISTANT: Thanks for reaching us.Have a nice day.

USER: Thanks for checking.