You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brian Moore.

ASSISTANT: How can I assist you today?

USER: I am planning to attend training for hotel management in PHX. can you please book a flight ticket from PHL?

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: My travel dates are Feb 14th and Feb 16th.

ASSISTANT: May I know your class preference?

USER: I will prefer to travel in business class.

ASSISTANT: In which airlines do you prefer to travel?

USER: I am comfortable with any airline.

ASSISTANT: Do you have any specifications regarding arrival and departure time?

USER: The depart time should be Morning.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates with your given details.

USER: Ok, no worries at all. Thank you.

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