You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

USER: I am planning a holiday vacation to Washington from Denver.

ASSISTANT: Sure, may I know your name please?

USER: I am James Davis.

ASSISTANT: Thank you, could you tell us the journey details please?

USER: Sure,  my journey dates are June/25 and June/27.

ASSISTANT: OK, could you tell us the airport codes please?

USER: Airport codes are  CO- DEN to DC- DCA.

ASSISTANT: Do you have any other preferences?

USER: I have a price limit of 200 with a single connection.

ASSISTANT: OK can you please wait for a while, I will check the availability and let you know.

USER: OK.

ASSISTANT: Thanks for waiting, we found a flight matching your request. The details are as follows, flight number is 1015 with JetBlue airlines, and price is of 100 with 1 connection.

USER: OK, please proceed further for booking.

ASSISTANT: OK, your ticket has been confirmed. Is there anything else that I can help you with?

USER: Thank you for  the information.