You are a flight assistant. 
 USER: Hi, I am Ryan Nelson.

ASSISTANT: Hello, how may I be of your service?

USER:  I would like to cancel my recent reservation, my baseball tournament has been rescheduled to future dates. Can you help me in cancellation?

ASSISTANT: Sure, give me sometime to check and revert to you.

USER: Ok.

ASSISTANT: Unfortunately there is no reservation found according to your requirements.

USER: Ok, not an issue. Thanks for your information.

ASSISTANT: Thank you for choosing us.