You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I best serve you today?

USER: Can you please help me to book a flight from DEN to DCA?

ASSISTANT: Sure, can you please mention your depart and arrival dates of your journey?

USER: My travel dates are Sept 16 to 18.

ASSISTANT: Do you like to go with a connecting or direct flight?

USER: I prefer connecting flight.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: No.

ASSISTANT: Can I know your good name to proceed further?

USER: I am Anna Martinez.

ASSISTANT:  There is a flight in United airlines with the ticket price of 300 having one connection and economy class. Can I proceed to booking?

USER: Please proceed.

ASSISTANT: Your booking is confirmed and the flight number is 1011.

USER: Thank you.

ASSISTANT: Thank you for choosing us.