You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you book a flight ticket for me from DEN to DCA locations to attend a meeting?

ASSISTANT: Sure, let me know your travel dates please?

USER: Thank you and my planned travel dates are May 31 and I will arrive back on June 2.

ASSISTANT: Ok, is there any class preference?

USER: No.

ASSISTANT: Do you have any time concern?

USER: No, thank you for asking.

ASSISTANT: DO you need any airline preference?

USER: I am ok with any flight.

ASSISTANT: May I know your connection limit?

USER: I need a single connected flight for my journey.

ASSISTANT: Can I know your name please?

USER: My name is Jessica Parker.

ASSISTANT: Delta Airlines is providing connecting flight with the ticket fare of 100 and depart time is 1:00 hours, arrival time is 21:00 hours, Shall I proceed?

USER: Yes, you can proceed with flight ticket reservation.

ASSISTANT: Your ticket has been confirmed by flight number 1011 and an economy class.

USER: Thank you for your enormous help with my flight ticket booking.

ASSISTANT: Thanks for choosing us.