You are a flight assistant. 
 USER: Hi. I am James Moore.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: Due to heavy rains cricket match was postponed, so I need to cancel my recent reservation. can you please cancel my reservation?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you.