You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I need to book a ticket from EWR to DCA. Could you book a ticket?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: Departure is Jan, 21 and return date is Jan, 23.

ASSISTANT: Do you have any specifications?

USER: I would like to return in the morning time.

ASSISTANT: Do you have any other specifications?

USER: I prefer to travel in economy class.

ASSISTANT: Please provide your name.

USER: My name is Donna Jackson.

ASSISTANT: The AA airline is providing an economy class flight with price 100 and the connections 1. Shall I confirm your ticket?

USER: Please book a flight.

ASSISTANT: Your ticket is booked. The flight number is 1018.

USER: Thank you.

ASSISTANT: Welcome, have a great day.