You are a flight assistant. 
 USER: Hello, I am Dennis Harris.

ASSISTANT: Hello, how may I serve you?

USER: I would like to visit Korean War of Veterans Memorial at Washington, DC - IAD. Will you aid me to book a flight ticket from Detroit, DTW?

ASSISTANT: Sure, may I know how much can you spend to buy your ticket?

USER: I can spend up to 200 only.

ASSISTANT: When are you planning to reach IAD?

USER: I am planning to reach IAD on 07/26.

ASSISTANT: Do you need a way station in the middle of your route from DTW to IAD?

USER: Yes, I need a halt.

ASSISTANT: When would you like to return?

USER: I would like to return on 07/28.

ASSISTANT: Ok, we found a best flight for you on your requested dates. The flight details are as follows, airline : JetBlue, flight number : 1012 and the price is 100. Shall I proceed with this airline?

USER: Ok, please proceed.

ASSISTANT: Your request for booking has been processed. you can collect your ticket at the time of check - IN.

USER: Thank you.

ASSISTANT: Thank you for picking us.