You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you?

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

ASSISTANT: Sure, I will help you. Please provide the name on which ticket was reserved.

USER: Sure, Christine White here.

ASSISTANT: Sorry, there is no reservation existing on your name.

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

ASSISTANT: You are welcome, have a nice day.