You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Janet Thomas from Las Vegas.

ASSISTANT: Welcome to flight booking agency Janet.

USER: Thanks, I have to go Washington next month, can you please book a flight ticket for me?

ASSISTANT: Sure, I am glad to help you with that.

USER: Thank you.

ASSISTANT: Can you please provide your planned dates of travelling?

USER: I want to take off on 12/13 and book my return ticket also on 12/15.

ASSISTANT: Ok, may I know your origin and destination airport codes for booking?

USER: I want to fly from LAS and destination airport is DCA.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Ok.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 300 is provided by Delta airlines. Shall I proceed with this?

USER: Please proceed.

ASSISTANT: Ok, your ticket has been booked in flight number 1016.

USER: Thank you for your help.

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