You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me to book a flight from DCA to JFK?

ASSISTANT: May I know your travel dates?

USER: Sure, I want to travel on Nov 20 and need to return on Nov 22.

ASSISTANT: Do you prefer connecting flight?

USER: I need a flight with single connection.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your good name?

USER: I am Timothy Lee.

ASSISTANT: We found a flight in an economy class with 1 connection in JetBlue airlines and the fare of your flight will be 100. Do you like me to proceed your booking with this flight?

USER: Ok, please proceed.

ASSISTANT: Your booking is done with flight number 1020.

USER: Thank you.

ASSISTANT: Thank you for reaching us.