You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I need to cancel my reservation as my exams got cancelled. Can you please cancel my reservation which I have done under my name Mark Young?

ASSISTANT: Sure, I am glad to help you in ticket cancellation process. Can you please wait a minute?

USER: Thank you and I will wait for your response.

ASSISTANT: Sorry Mark Young, there is no reservation under your name in our database to cancel.

USER: It's ok, anyway thank you for the information.

ASSISTANT: You are welcome. Thank you for choosing us.