You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I have booked a flight ticket to enjoy in my weekend but I have to cancel the ticket right now, can you help me ?

ASSISTANT: Sure, I will help you in cancelling the reservation. May I know your name please?

USER: Thank you for accepting my request and my name is David Davis.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no reservations found under your name.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for choosing us.

USER: Welcome.