You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, your good name please?

USER: I am Jack Collins.

ASSISTANT: How can I help you now?

USER: Due to some emergency work, I need to cancel my reservation. Can you please cancel my reservation?

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: I will check and update you. No reservation has been found.

USER: Ok.

ASSISTANT: Thanks for contacting us, have a nice day.

USER: Thank you.