You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I am looking for a flight from Washington to attend family meeting. Can you book a flight for me?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: I will travel on Sept 18 and return on Sept 20.

ASSISTANT: May I know your nearby airport codes?

USER: My source point is IAD and my destination is CLT.

ASSISTANT: Do you have any preferences?

USER: I prefer a connecting flight.

ASSISTANT: May I know your name please?

USER: My name is Shirley Parker.

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

USER: Please proceed with booking.

ASSISTANT: Your booking is done with flight number 1023. Happy journey.

USER: Thank you for helping me.

ASSISTANT: You are welcome, have a nice day.