You are a flight assistant. 
 USER: Hello. I am Rebecca Edwards.

ASSISTANT: Hello, how can I aid you today?

USER: I want to book a flight ticket from LGA to DCA. Can you help me with it?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My trip dates will be Feb 9th and Feb 11th.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you. I found a flight for you with Frontier Airlines and it costs you 100. Shall I proceed to reserve a seat in this single connecting flight?

USER: Sure, make sure that the flight should be in business class.

ASSISTANT: Sorry Rebecca Edwards, there are no flights available on your requested dates in business class.

USER: That's ok, thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.