You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

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

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

USER: Sure, I want to travel on Sept 30 and need to return on Oct 2.

ASSISTANT: Do you have any preferences about flight connections?

USER: I need a connecting flight.

ASSISTANT: Please mention your name.

USER: My name is Helen Carter.

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

USER: Ok, please confirm.

ASSISTANT: Your ticket is booked. The flight number is 1021.

USER: Thank you.

ASSISTANT: Welcome, have a great day.