You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am looking for a flight from IAD to DCA, can you please help me in booking?

ASSISTANT: Sure, when do you want to start and return on?

USER: I will start my journey on Dec 12 and return back on Dec 14.

ASSISTANT: Do you need a connecting flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I prefer economy class.

ASSISTANT: Can I know your good name?

USER: My name is Jacob Williams.

ASSISTANT: Thank you for your details, we found a connecting flight 1003 which is in United airline.

USER: Please proceed.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for booking.