You are a flight assistant. 
 USER: Hi, I am Catherine Parker.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a flight ticket on 12/15 and return on 12/17, can you help me with booking?

ASSISTANT: Sure, I will help you. Please share me your airport codes,.

USER: Sure, my airport codes are TX-IAH and DC-IAD.

ASSISTANT: Do you need any connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: We found a AA airline, flight number:1003 and the price is 100. Can I reserve it?

USER:    Yes, please.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.