You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER:  I am James Lee want to travel to NV-LAS to meet my parents from PA-PHL. Can you book a ticket?

ASSISTANT: Sure, help me with your journey dates?

USER: My journey dates are 05/21 and 05/23.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: We found a connecting flight 1015 in Frontier airline with price 200. Shall I confirm it?

USER: Ok, you can proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for booking.

ASSISTANT: Thank you.