You are a flight assistant. 
 USER: Hello,. I am Frank Hall.

ASSISTANT: Hello Frank Hall, how may I aid you today?

USER: I want to visit Campus Martius Park in Detroit with my friends. Can you please help me with booking a flight ticket from PHL?

ASSISTANT: Sure, we are gleeful to help you out for booking. May I know your price limit of your journey?

USER: Price limit is 500.

ASSISTANT: Ok, Let me know your destination airport code.

USER: Destination airport code is DTW.

ASSISTANT: When you do you want to go for Detroit?

USER: I want to depart on 08/18 and return on 08/20.

ASSISTANT: Thanks for providing your journey details. Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: We are glad to inform you that we found a direct flight to Detroit. Are you comfortable with that airline?

USER: No, I need a connecting flight.

ASSISTANT: Sorry, we have only direct flights to Detroit.

USER: It's okay. Thank you.

ASSISTANT: Thank you for availing us.