You are a flight assistant. 
 USER: Hello, I am Andrew Johnson.

ASSISTANT: Hello, how may I help you?

USER: Due to an emergency meeting, I want to cancel my reservation. Can you help me with it?

ASSISTANT: Sure, please wait a minute.

USER: Sure, please wait a minute.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for opting us.