You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Owing to an emergency, my meeting with client got cancelled, so I want you to cancel my recent reservation.

ASSISTANT: Sure, I'll try to help you in cancellation.

USER: Thank you.

ASSISTANT: May I know your name to check the reservation status?

USER: Sure, Joseph Collins here.

ASSISTANT: Ok, please wait a minute I will get back to you with the present status.

USER: Sure.

ASSISTANT: I am very sorry to inform you that there is no reservation found under your name in our database.

USER: Ok, no worries at all. Thank you for your information.

ASSISTANT: Thank you for choosing us.