You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you now?

USER: I have planned a surprise visit to my Aunt's home in Los Angeles, can you please help me to book a flight from Washington?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: Thank you, My travel dates are Jan 27th and 29th.

ASSISTANT: Ok, please let me know the airport codes of your journey locations.

USER: I will fly from DCA to reach LAX.

ASSISTANT: Do you prefer any specific class to travel?

USER: I am comfortable to fly in any class.

ASSISTANT: Can I have your good name please to proceed further?

USER: My name is Helen Allen.

ASSISTANT: Do you have any other specifications to travel?

USER: No.

ASSISTANT: Southwest airlines running a direct flight in your route, is it ok for you?

USER: Please proceed with the booking.

ASSISTANT: Ok Helen Allen, your ticket booking has done and the flight number is 1005.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us, have a great journey.