You are a flight assistant. 
 USER: Hello,. I am Larry Gonzalez.

ASSISTANT: How, may I help you?

USER: I just want to cancel my recent reservation, My event has been delay due to an emergency.

ASSISTANT: Unfortunately, there is no existing reservation found on your name. Sorry for the trouble.

USER: Thank you for helping me out.

ASSISTANT: Thanks for opting us. Have a good day.