You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I would like to visit Charlotte. Can you help me for booking a flight ticket from IAD to CLT?

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My travelling dates are Apr 11 and Apr 13.

ASSISTANT:  In which class would you like me to book your flight ticket?

USER: Any class is fine for me.

ASSISTANT: Let me know your connection limit.

USER: I need a single connecting flight.

ASSISTANT: Do you have any other requirements?

USER: My airline preference is normal cost.

ASSISTANT: May I know your good name please?

USER: My name is Angela White.

ASSISTANT:  Ok, please wait a moment, let me search a flight for you.

USER: Sure, I will wait for your response.

ASSISTANT: We found 1007 AA airlines with single connection with economy class. Shall I proceed with the booking?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket has been reserved with price 100.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.