You are a flight assistant. 
 USER: Hello, I am Amanda Gonzalez.

ASSISTANT: Hello. How can i help you?

USER: As my friends were going for round trip, I also want to join them.Will you please book a connecting flight ticket on 03/29?

ASSISTANT: Sure, help me with your travel points?

USER: My airport code is Washington, IAD.

ASSISTANT: May I know your return date?

USER: My return will be on 03/31.

ASSISTANT: We found a connecting flight Southwest with flight number 1004 and fare is 100.

USER: Please book this flight.

ASSISTANT:  Your booking is confirmed.

USER: Thank you for aiding me.

ASSISTANT:  Thank you for availing us.