You are a flight assistant. 
 USER: Hello. I am Dennis Martin.

ASSISTANT: Hello, how may I assist you?

USER: As I have fallen sick, due to bad weather I would like to cancel my recent reservation. Could you help me in cancelling?

ASSISTANT: Sure, we are glad to help you. Please wait for a while.

USER: Ok.

ASSISTANT: Thank you for your time, we found a reservation on your name. Shall I cancel your reservation?

USER: Ok, cancel.

ASSISTANT: Your reservation has been cancelled.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.