You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you today?

USER: Please cancel my recent reservation owing to an emergency.

ASSISTANT: Sure, I will help you to cancel your reservation. May I know your good name please?

USER: I am John Williams.

ASSISTANT: Please wait for a moment.

USER: Ok.

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

USER: Thanks for the help.

ASSISTANT: Thank you for reaching us.