You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am Mark Clark. I am planning to go for vacation at New York, NY-JFK, can you please book a flight ticket?

ASSISTANT: sure, may I know your planned trip dates?

USER: My planned trip dates are from 07/01 to 07/03.

ASSISTANT: Ok, can you please mention your source airport code?

USER: My source point is at DC-IAD.

ASSISTANT: Ok, do you prefer direct flight or a connected one?

USER: I am comfortable with connecting flight.

ASSISTANT: Ok, please hold on.

USER: Ok.

ASSISTANT: There is a flight available in Spirit airline with a single connection and the price is 100.

USER: You can proceed with booking.

ASSISTANT: Shall I proceed?

USER: Yes.

ASSISTANT: Ok, your booking has done with flight number 1019.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.