You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I want to organise an event in the independence hall for orphan children who lives in Philadelphia, PHL. Can you avail me to book a flight ticket?

ASSISTANT: Sure, can you share your trip dates?

USER: My travel dates are Mar 24 and 26.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Kindly, mention your source airport code.

USER: My source is from Detroit, DTW.

ASSISTANT: Is there any class preference?

USER: Yes, I prefer business class.

ASSISTANT: Are there any other specifications?

USER: No.

ASSISTANT: Please forward your name.

USER: Samantha Hall here.

ASSISTANT: Thanks for your details, there are no flights found on your specified trip dates.

USER: Ok, not an issue. Thanks for the help.

ASSISTANT: Thank you for availing us.