You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, welcome to flight booking agency.

USER: Brian Phillips here.

ASSISTANT: How can I guide you for today?

USER: I would like to visit Las Vegas in the month of January, so that I can enjoy the climate there, can you please help in booking a flight ticket for me?

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

USER: The travelling dates are from 01/25 to 01/27.

ASSISTANT: Can you please provide your nearest airport codes?

USER: Source airport code is HOU and destination airport code is LAS.

ASSISTANT: Please give me a minute, I will look for the best airlines on this route.

USER: Sure.

ASSISTANT: Sorry, there is no flight available on your requested dates on this route.

USER: That's ok, thank you for your help.

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