You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you now?

USER: Owing to an emergency, my planned trip with my colleagues to Navajo adventure has been cancelled. Can you help me with cancellation?

ASSISTANT: Sure, I will help you with cancellation. May I know your good name?

USER: Sure, I had a recent reservation with name Kevin Walker.

ASSISTANT: Ok, please wait for moment, while I check for the reservation.

USER: Thanks for your assistance.

ASSISTANT: Thanks for waiting, Sorry there is no reservation found on your name in our system data.

USER: Ok, no worries at all. Thanks for your help.

ASSISTANT: Thank you for reaching us, we hope see you again.