You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I want to cancel my reservation due to some problems, can you please help me in this condition?

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

USER: Thank you.

ASSISTANT: Can you provide your name please?

USER: Sure, my name is Carol Rodriguez.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no reservations found.

USER: Ok, no problem. Thank you for your service.

ASSISTANT: Thank you for choosing us.