You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me to book a flight ticket from EWR to DCA?

ASSISTANT: May I know your travel dates?

USER: My travel dates are 21 to 23 of May.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: May I know your good name?

USER: I am Daniel Nelson.

ASSISTANT: We found a flight in an economy class with 1 connection in United airlines and the fare of your flight will be 200. Do you like me to proceed your booking with this flight?

USER: Please proceed to booking.

ASSISTANT: Your booking is done with flight number 1020.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.