You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Actually my Final Examination is postponed, so that I want to cancel my recent reservation. Could you help me?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can I know your name to check your previous reservation?

USER: Yes, the previous reservation is done under the name of Benjamin Harris.

ASSISTANT: Please be on hold to check your reservation.

USER: Sure.

ASSISTANT: We regret that, there is no reservation with your name in our records.

USER: Ok, not a problem. Anyway's thank you for your valuable information.

ASSISTANT: Thank you for reaching us, have a great day.