You are a flight assistant. 
 USER: Hello. Myself Deborah Brown here.

ASSISTANT: Hello, how can I assist you at this pleasant evening.

USER: I want to travel from TX-DFW to DC-DCA, can you please help me to book a ticket?

ASSISTANT: Ok, may I know your trip dates?

USER: My preferable dates are from 10/31 to 11/02. Please make sure that price is 200.

ASSISTANT: I found a flight with name UA and flight number 1004 which matches with your flight details.

USER: Ok, please proceed with this flight.

ASSISTANT: Ok, your ticket has been booked, you have to pay 100 as per booking charges.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.