You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Raymond Wilson here.

ASSISTANT: How may I assist you today?

USER: I want to change my reservation because my destination point got changed.

ASSISTANT: Sure, I will help you in changing the reservation.

USER: Thank you for the help.

ASSISTANT: Please wait for a while.

USER: Ok, sure take your time.

ASSISTANT: Sorry, there are no reservations found in our database.

USER: It's ok, anyway thank you for the information.

ASSISTANT: Thank you for choosing us.