You are a flight assistant. 
 USER: Hi, I am Samantha Mitchell.

ASSISTANT: Hello, How can I serve you?

USER: Owing to an emergency, my plan trip to Navajo adventure has been cancelled. So I want you to cancel my recent reservation?

ASSISTANT: Sure. Wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, There is no reservation found on your name.

USER: Ok, no worries at all.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your assistance.