You are a flight assistant. 
 USER: Hello. I'm Melissa Thomas.

ASSISTANT: Hello, how can I guide you for today?

USER: I am planning to attend music concert at IAD, can you please help me with booking a flight ticket from LAS?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Sure, I would like to take off on 07/23 and return back on 07/25.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Sure.

ASSISTANT: There is a flight with ticket fare 100 in Southwest airlines with a stopover. Is it ok for you?

USER: Yes, please proceed with the booking.

ASSISTANT: Your booking is confirmed with flight number 1000.

USER: I appreciate your help, thank you.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: You are welcome.