You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Gregory Martinez.

ASSISTANT: Gregory, how can I assist you today?

USER: My friend has planned a trip to Las Vegas Casino resort, can you help me in booking a ticket?

ASSISTANT: Could you please tell us your travel dates?

USER: My travelling dates are from 01/02 to 01/04.

ASSISTANT: Please provide us your source and destination airport codes.

USER: My origin airport code is AUS and my destination airport code is LAS.

ASSISTANT: Please wait, let me check for the available flights.

USER: Please find a flight with 1 connection limit, as my friend is joining in the middle of my trip.

ASSISTANT: Sorry Gregory, there are no flights available on your provided date.

USER: Ok, no problem. I will find any other mode of transport to reach Las Vegas.

ASSISTANT: Fine, thank you for contacting us.

USER: Anyway, thanks for your information.

ASSISTANT: You are welcome.