You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning to visit and participate in the multi-car 50 mile canyon road test drive which is famous ride and it is going to be held in Denver, DEN. Can you avail me to book a flight ticket?

ASSISTANT: Sure, please provide your source airport code.

USER: My source is from Washington, IAD.

ASSISTANT: Please provide your travelling dates .

USER: My travel dates are Mar 16 and 18.

ASSISTANT: Do you have any preferences about flight connections?

USER: I need a break in my journey.

ASSISTANT: Do you have any preferences about class?

USER: I am comfortable to travel in any class.

ASSISTANT: Please mention your name.

USER: Brian Martin here.

ASSISTANT: The Frontier airlines providing an economy class flight with price 100 and the connections 1. Shall I confirm your ticket?

USER: Can you check the return flight in the morning time?

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

USER: Ok, thank you.

ASSISTANT: Welcome, have a great day.