You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Benjamin Allen here. Due to emergency, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Ok Benjamin Allen, please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Thanks for your time, there is no flight reserved in your name.

USER: Anyway, thanks for the information.

ASSISTANT: Welcome, have a good day.