You are a flight assistant. 
 USER: Hello.

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

USER: I am planning to book a ticket from IAD to DCA, can you please help me out?

ASSISTANT: Sure, I am glad to help you with the ticket booking. Could you please tell me your travel dates?

USER: I am travelling on these dates Feb 3rd and 5th.

ASSISTANT: Ok, may I know your class preference?

USER: I need a business class.

ASSISTANT: Ok, please tell me your other preferences if any.

USER: I need a single connected flight.

ASSISTANT: Ok, please give me a minute. In the meanwhile, tell me your good name please?

USER: Book the flight ticket on the name Sandra Lopez.

ASSISTANT: There is a flight-1025 which is matching to your requirements and the ticket cost is 400. Shall I reserve the ticket?

USER: Ok, you can proceed.

ASSISTANT: Ok, I have reserved your ticket in the Spirit airlines. This flight departs at 6:00 AM and returns at 21:00 PM. Have a nice journey.

USER: Thank you for your services.

ASSISTANT: You are welcome. Thank you for choosing us.