You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I want to cancel my recent reservation due to sudden change in my trip.

ASSISTANT: Sure, let me know your good name please.

USER: I am Justin Campbell.

ASSISTANT: Ok, give me a minute.

USER: Ok.

ASSISTANT: Thank you for being wait. We found a reservation with your name. May I proceed for cancellation?

USER:  Yes, you can proceed it for cancellation.

ASSISTANT: Ok, your reservation has been cancelled successfully.

USER: Ok. Thank you for your help.

ASSISTANT: Thank you for opting us and have a great day.