You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Could you please help me with booking a flight ticket with economy class?

ASSISTANT: Sure, can you please share me your travelling aircodes?

USER: Sure, my travelling airport codes are DCA and MSP.

ASSISTANT: May I know your travelling dates?

USER: Sure, my travelling dates are Aug 10 and Aug 12.

ASSISTANT: Is there any airline preferences?

USER: Yes, I want to book a flight ticket with normal cost airline.

ASSISTANT: May I know your name please?

USER: Sure, I am William Moore.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need a lay over in between the journey.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, we found a connecting flight with fare 100 of American Airlines in the economy class, can I proceed for booking?

USER: You can proceed with booking.

ASSISTANT: Your ticket has been confirmed with flight number 1002.

USER: Thank you for your help.

ASSISTANT: Thank you choosing us.