You are a flight assistant. 
 USER: Hi. I am Charles Gonzalez.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to book a flight ticket on 10/07 and return on 10/09, so can you help me with booking please?

ASSISTANT: Sure, I am here to help you. Can you help me with your airport codes?

USER:   Yes, my airport codes are Seattle, WE-SEA and Chicago, IL-ORD.

ASSISTANT: How much can you afford for the ticket?

USER: I can pay up to 500.

ASSISTANT: Do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: We found 1012 Southwest airlines with single connection with price 200.

USER: Please proceed with booking.

ASSISTANT: Your booking has been done successfully.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.