You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please book a flight ticket from OAK to IAH?

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

USER: Thank you. I have planned my travel dates  as Apr 19 and Apr 21.

ASSISTANT: Do you have any preferences about flight connections?

USER: I would prefer  business class to travel so please make sure that.

ASSISTANT: Please mention your name.

USER: Sure, myself Brandon Martinez.

ASSISTANT: The Delta airlines providing business class flight with price 600 and the connections 1. Shall I confirm your ticket?

USER: That is fine, please proceed with booking.

ASSISTANT: Your ticket is booked. The flight number is 1011.

USER: Thank you for your help.

ASSISTANT: Welcome, have a great day.