You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I am Betty Lewis.

ASSISTANT: Welcome to flight booking agency Lewis.

USER: I would like to change reservation as I am moving to my hometown, can you please help me out?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Please wait a moment to check your previous reservation status.

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no reservation found with your name in our records.

USER: Oh! May be booking is not done properly. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us, have a great day.

USER: Most welcome.