You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I would like to meet my brother on his birthday, can you please book my flight ticket from IAH to PHX?

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

USER: I will depart on Oct 27th and return back on Oct 29th.

ASSISTANT: Do you have any preferences about flight connections?

USER: Yes, I need a flight having single connection.

ASSISTANT: Do you have any preferences about class?

USER: Yes, I prefer for a normal-cost airline.

ASSISTANT: Please mention your name.

USER: My name is Anna Johnson.

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

USER: Yes, please book my ticket.

ASSISTANT: Your ticket is booked. The flight number is 1001.

USER: Thank you very much.

ASSISTANT: Welcome, have a great day.