You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: Owing to an emergency, my planned trip to Denver visit downtown aquarium has been cancelled. So I want you to cancel my existing reservation?

ASSISTANT: Ok, may I know your name?

USER: Sure, I had a recent reservation with name Thomas Adams.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, there was no reservation found on your name.

USER: Ok, no issues. Thank you for availing us.

ASSISTANT: Thank you for contacting us.