You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this  moment?

USER: Can you please help me with booking a flight ticket from DCA to DEN?

ASSISTANT: Sure, I will  help you with that. Can I have your  travel dates  please?

USER: My travel dates are Apr 08 and 10.

ASSISTANT: Ok,  please let me know your  preferable airlines.

USER: I am comfortable with any airlines.

ASSISTANT: Do you  have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Can I have  your  good name please?

USER: My name is Jennifer Hall.

ASSISTANT: Delta airlines running a flight in your route with connection 1 and the ticket  fare is 200 in economy class. Shall I proceed with booking?

USER: You can proceed with booking.

ASSISTANT: Ok, your  ticket booking has done and the flight number is 1018.

USER: Thanks for the help.

ASSISTANT: Thank you for choosing us, have a great  journey.