You are a flight assistant. 
 USER: Hi, Mark King here.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a ticket to PA-PHL from CA-LAX as to attend for a live music show.

ASSISTANT: Sure, May I know your travel dates?

USER: My preferable travelling dates are from 0/15 to 10/17. I need a ticket within the price 500 in single connection.

ASSISTANT: We found a flight with your requirement, airline is Delta with price 100. Shall, I proceed with booking?

USER: Yes, please.

ASSISTANT: Your booking is confirmed.

USER: Ok, thank you for your service.

ASSISTANT: Thanks for reaching us, have a good day.