You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am Stephanie Hall. I want to attend my friend's wedding in Las Vegas. Can you book a flight ticket from DCA to LAS?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your planned dates of travelling?

USER: I want to travel in the flight on 02/21 and 02/23.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Ok, take your own time.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 is provided by Delta airlines. Shall I proceed with this?

USER: Proceed to booking.

ASSISTANT: Ok, your ticket has been confirmed in flight number 1009.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us, have a great day.