You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be of your helping hand?

USER: I want to travel from IAD to PHX for my business meeting, can you please help me to book my flight ticket?

ASSISTANT: Sure, when would you like to travel?

USER: Sure, I want to depart on Mar 6th and return back on Mar 8th.

ASSISTANT: Let me know your specifications please?

USER: I would like to return in the evening.

ASSISTANT: May I know your name please?

USER: My name is Samantha Thompson.

ASSISTANT: We found a connecting flight with Hawaiian which returns back at 23:00PM having an economy class seat with flight number 1008. Shall I proceed to book?

USER: I prefer for a business class.

ASSISTANT: Sorry, there is no business class tickets available.

USER: Not an issue, thank you for checking.

ASSISTANT: Thank you for choosing us.