You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: Owing to an emergency, my planned trip to sky diving with friends got cancelled. So I request you to cancel my recent reservation.

ASSISTANT: Can I have your name please?

USER: Sure, I have existing reservation with name Joshua Collins.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: There is no reservation found with your given name.

USER: Ok, no worries at all.

ASSISTANT: Thank you for availing us.

USER: Thank you for your information.