You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be at your service today?

USER: Could you please book a flight ticket from DEN to LAX?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are Apr 25 and Apr 27.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight. And I prefer a business class.

ASSISTANT: Please help me with your name for booking.

USER: I am Jason White.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 700 with flight number 1009. Shall I proceed with this flight?

USER: Ok, proceed.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Most welcome.