You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Unfortunately my trip trip was cancelled, so please help me in cancelling my recent reservation.

ASSISTANT: Sure, could you provide me your name?

USER: Sure, I am Dorothy Hill.

ASSISTANT: Ok, do you have any other plans?

USER: No, I didn't planned anything. I will contact you in future after plan my trip.

ASSISTANT: Ok, thank you. Sorry Hill, no reservation found on your name.

USER: It's ok, no problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you.