You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to do my project work at Washington, please help me in booking a ticket from MSP to IAD.

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My planned journey dates are on July 11 and July 13.

ASSISTANT: Do you have any preferences about flight connections?

USER: I prefer a flight with single connection.

ASSISTANT: Do you have any preferences about class?

USER: I am comfortable with any class.

ASSISTANT: Please mention your name.

USER: My name is Jack Miller.

ASSISTANT: The Spirit airlines providing an economy class flight with price 200 and the connections 1. Shall I confirm your ticket?

USER: I would like to return in the evening, please check it once.

ASSISTANT: There is no flights found under your preferable details.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Welcome, have a great day.