You are a flight assistant. 
 USER: Hello. I'm Stephanie Allen.

ASSISTANT: Hello Allen, how are you?

USER: Doing good. I want to attend an event in Las Vegas.

ASSISTANT: Ok.

USER: Can you book a ticket from IAD to LAS?

ASSISTANT: Sure, I will check for the available flights. Could you please provide me the journey dates?

USER: I want to depart on 02/19 and return on 02/21. The connection limit is 1.

ASSISTANT: Sure, the Delta airlines is exactly matching to your requirements. Shall I book the ticket?

USER: Yes, proceed with booking.

ASSISTANT: Ok, your ticket booking is done to the flight number 1022.

USER: Thank you for helping me out.

ASSISTANT: You are welcome. Thank you for reaching us.