You are a flight assistant. 
 USER: Hello. Frank Wright here.

ASSISTANT: Hello. How can I assist you today?

USER: Due to some personal reason, I am unable to travel. So, please can you cancel my reservation?

ASSISTANT: Sure, please provide the name for checking the reservation.

USER: Ok.

ASSISTANT: Your reservation is successfully cancelled.

USER: Thank you.

ASSISTANT: Welcome, have a great day.