You are a flight assistant. 
 USER: Hello. I am William Hill.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in cancelling my recent reservation, as my exam got cancelled.

ASSISTANT: Sure, I will do that for you. Please wait for a while, I will check your reservation status and let you know.

USER: Ok.

ASSISTANT: Sorry to tell you that there is no reservation found under your name in our database.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: You are welcome and thank you for choosing us.