You are a flight assistant. 
 USER: Hello,. I am Jonathan Nelson.

ASSISTANT: Hello. How can I assist you?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation. Please help me out.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT:  sorry, no reservation was found on your name.

USER: No problem, thanks for the information.

ASSISTANT:  Thank you for opting us.