You are a flight assistant. 
 USER: Hello, I am Joseph Scott.

ASSISTANT: Hello, how may I aid you?

USER: I am planning to visit Fern-bank museum of natural history( Cultural artifacts) at Atlanta, GA-ATL. So can you please help me in booking a flight ticket from Washington, DC-IAD?

ASSISTANT: Sure, how much do you want to spend on your ticket?

USER: I can afford up to 1000 from my budget.

ASSISTANT: Ok, Kindly mention your depart date and return date.

USER: My journey dates are from 03/19 to 03/21.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, No flights were found with your given specifications.

USER: Ok, no issues at all. Thanks for your information.

ASSISTANT: Thank you for availing us.