You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Raymond Wright.

ASSISTANT: How can I help you today?

USER: I have a business meeting in Las Vegas, can you help me for booking a flight ticket?

ASSISTANT: Sure, I will help you in booking. Can you please share your travel dates?

USER: My travelling dates are 01/27 and 01/29.

ASSISTANT: Ok, may I know your airport codes?

USER: My source airport code is DFW and destination airport code is LAS.

ASSISTANT: Please hold on for a while.

USER: I need a direct flight.

ASSISTANT: Sorry, no direct flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a safe flight.