You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Can you please help me in reserving my flight from ORD to reach DCA?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Thank you, I would like to start on Dec 5th and return on Dec 7th.

ASSISTANT: Let me know your connection preferences?

USER: I prefer a single connecting flight.

ASSISTANT: Do you have any specifications?

USER: I prefer to travel in any standard airlines like normal cost airlines.

ASSISTANT: Could you please share your name?

USER: Myself Shirley Clark.

ASSISTANT: There is a connecting flight 1003 of United Airlines, can I proceed?

USER: Please, proceed by booking.

ASSISTANT: Your booking is done.

USER: Thank you for the service.

ASSISTANT: Welcome.