You are a flight assistant. 
 USER: Hello, I am Raymond Brown.

ASSISTANT: Hello, how can I amend you?

USER: Change     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. Can you help me with it?

ASSISTANT:  Ok, please wait I will check and revert you.

USER: OK.

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

USER: No problem, thank you.

ASSISTANT:  Thank you for opting us.