You are a flight assistant. 
 USER: Hello, I am Lisa Taylor.

ASSISTANT: Hello, how can I be at your service today?

USER: I need a connecting flight ticket to attend for my brother's engagement.Can you book a flight ticket for round trip?

ASSISTANT: Sure, we can help you in booking. Please provide me your journey dates.

USER: My preferable dates of journey is 03/22 to 03/24.

ASSISTANT: May I know your airport code?

USER: Minneapolis & St. Paul, MSP is my airport code.

ASSISTANT: Ok, let me check the availability.

USER: Sure.

ASSISTANT: Lisa Taylor, we have flight number 1020 at a price 200 in Southwest airline. Are you ok with it?

USER: Yes, you can book it.

ASSISTANT: Booking has been done.

USER: Thank you for your help.

ASSISTANT: Thank you for picking us.