You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I would like to cancel my reservation because my friend meet an accident.

ASSISTANT: Please wait a while.

USER: Can you help me?

ASSISTANT: May I know your name please?

USER: My name is Patrick Williams.

ASSISTANT: There is no reservation on your name in our database.

USER: Ok, no problem. Thank you so much.

ASSISTANT: Thank you for opting us.

USER: Most welcome.