You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I helpful to you?

USER: I am Richard Smith.

ASSISTANT: Ok.

USER: I need to travel to Boston, BOS to attend a seminar in my college. Could you please make the reservation for me?

ASSISTANT: Sure, let me know your price limit?

USER: I can afford up to 500.

ASSISTANT: When you have planned to travel?

USER: I will start on 08/12.

ASSISTANT: Ok, where you want to board from?

USER: My  boarding point is Washington, DCA.

ASSISTANT: When you are intend to return from Boston?

USER: My return will be on 08/14.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: I found a direct flight based on your preferable locations.

USER: I need a connecting flight.

ASSISTANT: Ok.

USER: Do not proceed further. Thank you.

ASSISTANT: Thanks for contacting us. Have a nice day.