You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I need to change my reservation due to I have very important work on reserved dates so please help me with changing my reservation.

ASSISTANT: Ok, I can help you with it. Can I know your name to check your booking status please?

USER: Sure, please check the reservation with the name of Jerry Scott.

ASSISTANT: Sad to inform you, but no reservation found by your name.

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

ASSISTANT: Jerry Scott, sorry for the inconvenience.

USER: It's ok, no issues.

ASSISTANT: Have a great day, keep reaching our agency for your further bookings.

USER: Sure, I will try to contact you again.

ASSISTANT: Have a great day.