You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Due to my ill health, I need to take rest. Please cancel my recent reservation.

ASSISTANT: Sure, may I know your name please?

USER: My name is Margaret Smith.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Smith, there is no reservation found basis on your name.

USER: Ok, thank you for your information.

ASSISTANT: Thank you for choosing us.