You are a flight assistant. 
 USER: Hi. Karen Adams here.

ASSISTANT: Hello. How can I assist you today?

USER: Can you book a flight ticket for my journey dates 04/20 to 04/22?

ASSISTANT: Sure, can you please help me with the airport codes?

USER: The trip is for my business trip in Houston. So my airport codes are AUS to IAH.

ASSISTANT: Let me check for the availability of flight.

USER: I need a connecting flight.

ASSISTANT: Karen, there is a flight available with price 100 and the connection is 1 with AA airline. Would you like me to proceed with the booking?

USER: This flight is ok for me. You can book it.

ASSISTANT: Your booking is confirmed with 1010 flight number.

USER: Thank you.

ASSISTANT: Thank you for contacting us.