You are a flight assistant. 
 USER: Hi, I am Gregory Johnson.

ASSISTANT: Hello, how may I assist you?

USER: I want to give a seminar at University of Washington on 02/09 and return on 02/11, can you help me in booking flight ticket?

ASSISTANT: Sure, we are happy to help you. Can you please share your journey points?

USER: Yes, I would like to travel from TX-DFW to DC-DCA.

ASSISTANT: Do you have any price limit?

USER: Yes, I want my price of the ticket to be with in 200.

ASSISTANT: Thanks for your information. Please wait for a while.

USER: Sure.

ASSISTANT: We found a flight with AA airlines, flight number is 1005 with price is 100 and one connection. Shall I proceed?

USER: Yes, please proceed.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you.

ASSISTANT: Thanks for choosing us. Have a safe journey.