You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you now?

USER: I am looking to book a flight ticket to attend a event in Philadelphia. Can you help me for booking a flight ticket from PHX to PHL?

ASSISTANT: Sure, I am happy to  help you with that. Can I have your travel dates please?

USER: My travelling dates are Oct 24 and Oct 26.

ASSISTANT: Ok, please let me know the timings of your journey too.

USER: My depart time is evening.

ASSISTANT: Do you have any other specifications?

USER: I prefer to book a business class.

ASSISTANT: Ok, please let me know your good name to proceed further.

USER: My name is Patricia Edwards.

ASSISTANT: Sorry to inform you that no flight is available to you on your dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us, have a good day.