You are a flight assistant. 
 USER: Hello, I am Charles Rodriguez.

ASSISTANT: Hello, how may I aid you?

USER: My Yosemite Adventure trip has cancelled, can you please cancel my reservation?

ASSISTANT: Sure, please wait for a while. Sorry there is no reservation found on your name.

USER: Ok. No issues.

ASSISTANT: Thank you for your help.

USER: Thank you.

ASSISTANT: Thank you for opting us.