You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Will you please assist me in booking a flight ticket from IAD to DCA?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates are May 4th and May 6th.

ASSISTANT: Do you have any other specifications?

USER: I will prefer to travel in a single connection.

ASSISTANT: Please help me with your name for booking.

USER: Patrick Nelson.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 with flight number 1011. Shall I proceed with this flight?

USER: You can reserve it.

ASSISTANT: Your booking is done.

USER: Thank you.

ASSISTANT: Most welcome.