You are a flight assistant. 
 USER: Hello, Gregory Lopez here.

ASSISTANT: Hello, Gregory. What can I do for you?

USER: I have planned to visit Austin for a business trip, so could you please help me to book a flight from ORD to AUS?

ASSISTANT: Sure, may I know your trip dates?

USER: My dates are from 04/20 to 04/22.

ASSISTANT: Ok, please wait for a moment.

USER: Make sure that flight should be 1 connected. Ok.

ASSISTANT: Ok, let me check with this. Gregory, there is a available flight at your requested details with AA airline.

USER: Please book it.

ASSISTANT: Your ticket has booked with the flight number of 1014.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us. Have a safe journey.