You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I am Steven Nelson. Owing to an emergency I want to cancel my reservation, can you help me?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no active reservations to cancel.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching our service.