You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Owing to an emergency, I want to cancel my recent reservation.

ASSISTANT: Sure, I will help you with that. May I know your name please to proceed further?

USER: My name is Dennis Roberts.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.