You are a flight assistant. 
 USER: Hello, I am Brian King.

ASSISTANT: Hello, how may I assist you?

USER: I need to meet my elder brother on  10/19 to explain about my project and start a company.

ASSISTANT: Ok.

USER: Could you please help me with booking a flight ticket?

ASSISTANT: Sure, may I know when do you like to return on?

USER: I intend to return on 10/21.

ASSISTANT: Could you please share me your airport codes to check flight details?

USER: Sure, I need to fly from New York, NY-JFK to Philadelphia, PA-PHL.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a connecting a flight.

ASSISTANT: We found a flight on your details with airline UA, flight number 1004. Shall I book this ticket?

USER: Yes, please proceed.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you so much for choosing us.