You are a flight assistant. 
 USER: Hi, I am Matthew Gonzalez.

ASSISTANT: Hello,. On what way, Can I useful to you today?

USER: Owing to an emergency, my business conference at Washington has been cancelled. So I want you to cancel my existing reservation?

ASSISTANT: Sure, I will help you in cancellation. Please wait, I will check your reservation status.

USER: Sure.

ASSISTANT: We are happy to inform you that, we found a reservation on your name & it has been cancelled.

USER: Thank you for your help.

ASSISTANT: Thanks for choosing us.