You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Please help me to book a flight ticket from BOS to IAH?

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

USER: My journey dates are Nov 18 to Nov 20.

ASSISTANT: Do you have any preferences about flight connections?

USER: I need a single connection of flight.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Please mention your name.

USER: Susan Clark.

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

USER: Ok, please proceed.

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

USER: Thank you.

ASSISTANT: Welcome, have a great day.