You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I best render you now?

USER: My exams was postponed so I want to cancel my reservation, can you please help me to cancel my reservation?

ASSISTANT: Sure, we can cancel your reservation right now. Can you please provide me your good name please?

USER: Myself Andrew Moore.

ASSISTANT: Just give me a moment, I will check the reservation list and revert to you.

USER: Ok, I will wait.

ASSISTANT: Sorry, there is no active reservation found on your name.

USER: Ok, no problem.

ASSISTANT: Thanks for approaching us,.

USER: Thank you so much for your kind service.

ASSISTANT: Wish you a wonderful day.