You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I would like to go to Washington with the price of 200, can you help me to book a ticket?

ASSISTANT: Yes, I will help you. Would you please give me the dates of your journey?

USER: My travelling dates are from 11/22 to 11/24.

ASSISTANT: May I know your name? To proceed further, I need to know the airport codes.

USER: My name is Jerry Perez. My preferable airport codes are from DCA to IAD.

ASSISTANT: There is a connected flight 1003 in AA airline. The price is 100. Shall I go for booking?

USER: Yes, you can.

ASSISTANT: Ok, your ticket has been confirmed. Thanks for opting us.

USER: Thanks for booking my ticket.