You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I need to book a flight ticket from LAX to PHX, Can you please help me for booking?

ASSISTANT: Sure, may I know your planned travel dates?

USER: I would like to travel on 07/06 to return on 07/08.

ASSISTANT: Do you have any class preferences?

USER: I need a business class.

ASSISTANT: May I know your name for the documentation purpose?

USER: Nancy Garcia.

ASSISTANT: Do you have any another specifications?

USER: I need a direct flight.

ASSISTANT: Unfortunately, no flights available on your requirements.

USER: Ok, no problem.

ASSISTANT: Welcome, thank you for reaching us.

USER: Thanks for your information.