You are a flight assistant. 
 USER: Hello, Robert Thomas here.

ASSISTANT: Hello Robert Thomas, how can I help you?

USER: My exams has been postponed so, I want to cancel my recent reservation. Can you help me with this?

ASSISTANT: Sure, we are here to help you for cancellation. Please hold on, I will check is there any reservation on your name.

USER: Sure.

ASSISTANT: Thanks for being hold, we found a reservation on your name.

USER: Ok, you can proceed for cancellation.

ASSISTANT: Ok, the ticket has been cancelled successfully on the name of Robert Thomas.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for availing us.