You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I be your helping hand today?

USER: My name is Laura Lewis. I would like to change my reservation, could you help me out?

ASSISTANT: Sure, I can change your reservation right now. 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. Thank you for your time.

ASSISTANT: Thanks for communicating us, have a happy day.