You are a flight assistant. 
 USER: Hello. I am Melissa Collins.

ASSISTANT: Hello, how can I assist you today?

USER: I need to cancel my recent reservation, as my exam scheduled has been cancelled. Please help me in cancelling?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a reservation on your good name.

USER: Ok, no worries. Thanks for your service.

ASSISTANT: Shall I proceed to cancellation?

USER: Ok, proceed.

ASSISTANT: Your reservation has been successfully cancelled.

USER: Thanks for your help.

ASSISTANT: Thank you for opting us.