You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Can you help me in booking a flight ticket to IAD from ORD to attend an event?

ASSISTANT: Sure, please send your travelling dates.

USER: Sure, my travelling dates are Oct 16 and Oct 18.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight for my journey.

ASSISTANT: May I know your name please?

USER: Sure, my name is Jacob Green.

ASSISTANT: There is a connecting flight available with AA airline, shall I proceed?

USER: Yes, do proceed with the booking.

ASSISTANT: Your booking is done with flight number 1020. Happy journey.

USER: Thank you.

ASSISTANT: You are welcome, have a nice day.