You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My name is Ronald Young. I want to visit Lake Travis in Austin, so please book a flight ticket with a price limit of 500.

ASSISTANT: Sure, Please share me your travel dates.

USER: My departure day is 09/14, return day is 09/16.

ASSISTANT: Can I have your airport codes?

USER: My source and destination airport codes are MN-MSP, TX-AUS. And connections limit is one.

ASSISTANT: We found a connecting flight with price 100, flight number 1015. Shall I confirm with UA airline?

USER: Yes, please.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for booking a flight ticket.

ASSISTANT: Thank you for choosing our service.