You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: My name is William Smith. Owing to an emergency, I want to cancel my recent reservation.

ASSISTANT: Sure, Please wait for a while.

USER: Ok.

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

USER: No issue, thanks for your quick response.

ASSISTANT: Thank you for contacting us.