You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I need to book a flight ticket from Austin to reach Las Vegas. Can you please help me to book the ticket?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Thank you. I would like to travel on the dates of Nov 24 and Nov 26.

ASSISTANT: Can I know your name please?

USER: My name is Brandon Brown.

ASSISTANT: Do you need any specifications?

USER: I prefer to travel in an economy class flight.

ASSISTANT: Can I know your airline preference please?

USER: No, I didn't have any airlines preference.

ASSISTANT: Can I know your connection limit?

USER: I prefer a single connecting flight to travel.

ASSISTANT: From which airport codes you want to travel?

USER: The source and destination airport codes are AUS and LAS.

ASSISTANT: Sorry, there are no flights found.

USER: It's ok, not a problem. I will choose some other source to travel. Anyways thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.