You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I want to cancel my reservation because of some crisis.

ASSISTANT: What can I do for you?

USER: Can you help me in cancelling?

ASSISTANT: Sure, I will help you in cancelling. May I know your name please?

USER: Please, check the previous reservation on Jason Hill.

ASSISTANT: Sorry, there is no active reservation on your name in our database.

USER: That's ok, no issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your help.