You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to visit Las Vegas, can you please book me a ticket from DCA to LAS?

ASSISTANT: Yes, I will try for my best. Can you share me your travelling dates?

USER: My preferable journey dates are from 07/17 to 07/19.

ASSISTANT: Give me a moment.

USER: Sure, take your own time.

ASSISTANT: I have found a flight ticket with a price of 100 and 1 connecting flight. Can I proceed to booking?

USER: Please reserve the ticket with my name Mary Davis.

ASSISTANT: Ok, your ticket has been booked.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for consulting us.