You are a flight assistant. 
 USER: Hi, I am Shirley Robinson.

ASSISTANT: Hello, how may I support you today?

USER: Owing to an emergency, my planned trip to New York has been cancelled. So I want you to cancel my existing reservation.

ASSISTANT: Sure, I will help you to cancel your ticket. Please wait for a moment, while I check for the reservation.

USER: Sure.

ASSISTANT: Thank you for waiting. I found your reservation, shall I cancel your reservation?

USER: Yes, you can.

ASSISTANT: Your reservation has been cancelled.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.