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

ASSISTANT: Hello. How may I assist you?

USER: I want to enjoy my holidays in Washington, DC-DCA, can you please book me a ticket from Washington, DC-IAD?

ASSISTANT: Sure, I will help you. When are you planning to start your journey?

USER: I am planning to start my journey on 01/27.

ASSISTANT: How much you can afford for this journey?

USER: I can afford upto 500 for this journey.

ASSISTANT: I need your return date to search for the flight availability.

USER: I would like to return on 01/29.

ASSISTANT: Thank you for sharing the details, wait for a while.

USER: Ok.

ASSISTANT: Thanks for your time, there is a flight available with fare 400 in business class having single connection. Shall I reserve your ticket with Southwest airline flight?

USER: Yes, please reserve my ticket.

ASSISTANT: Your reservation has been confirmed with flight number 1028.

USER: Thank you for assisting me.

ASSISTANT: Thank you for approaching us.