You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency, I want to cancel my recent reservation. Can you assist me with the cancellation?

ASSISTANT: Please provide your name.

USER: Myself Brian Scott.

ASSISTANT: I regret, no reservation found.

USER: Ok, thanks for your response.

ASSISTANT: Thanks. Have a nice day!.