You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: David Gonzalez here. I am planning to book a flight ticket to DCA from CLT, can you please help me out?

ASSISTANT: Sure, I will help you. When would you like to plan your journey?

USER: Sure, my planned travelling dates are Jan 17 and 19.

ASSISTANT: Do you have any specifications?

USER: Yes, my airline preference is normal cost.

ASSISTANT: I found an economy class ticket in AA airlines with fare 200 and it has single connection. Can I book your ticket?

USER: Ok, please proceed.

ASSISTANT: Ok, your booking is confirmed with flight number 1012.

USER: Thank you for the help.

ASSISTANT: Thank you for choosing us.