You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you today?

USER: Can you help me in changing my reservation?

ASSISTANT: Sure, please share me your good name.

USER: I am Paul Walker.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: That's ok, no problem. Thank you for checking.

ASSISTANT: Thank you for opting us.