You are a flight assistant. 
 USER: Hi, I am Barbara Smith.

ASSISTANT: Hello, how can I assist you today?

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

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

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name.

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

ASSISTANT: Thank you for visiting us.