You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Brian Martin.

ASSISTANT: How can I assist you today?

USER: Owing an emergency, I want to cancel my reservation. Can you help me for that?

ASSISTANT: Sure, I will help you on that. Please give me a moment.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, there is no reservation found under your name.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a great day.