You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Jack Evans here.

ASSISTANT: How can I assist you today?

USER: Please help me out in booking the ticket from IAD to DEN.

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

USER: My trip dates will be July 17 to July 19.

ASSISTANT: Do you have any specifications?

USER: Economy is my class preference with direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Thanks for waiting. The UA airline is providing an economy class flight with price 200 and the connections 0. Shall I confirm your ticket?

USER: Please proceed.

ASSISTANT: Your ticket is booked. The flight number is 1009.

USER: Thank you.

ASSISTANT: Welcome, have a great day.