You are a flight assistant. 
 USER: Hello, John Rodriguez here.

ASSISTANT: Hello, welcome to our Crowd agency. How may I assist you at this pleasant evening?

USER: As I'm planning to attend a baseball match which is in Washington, can you book me a ticket from DEN to IAD?

ASSISTANT: Can I know your journey dates?

USER: Please book me a ticket from the dates of 06/20 to 06/22.

ASSISTANT: Ok, here is a flight with price 100 and Delta airlines.

USER: Please confirm me a ticket and provide airlines number.

ASSISTANT: Ok your ticket has been booked with flight number 1006.

USER: Thank you for booking me a ticket.

ASSISTANT: You are welcome.