You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I help you today?

USER: I am Stephanie Lopez.

ASSISTANT: Ok.

USER: I am planning to give party to my friends at PHL, can you please book a direct flight?

ASSISTANT: Sure, I am perky to help you. Let me know your trip dates,please.

USER: I want to start from 02/16. Return is on 02/18.

ASSISTANT: Ok. Please send me your boarding point.

USER: Origin code is Detroit, DTW.

ASSISTANT: Based on the mentioned details, there is no direct flight avalaible.

USER: Ok, No problem. Thank you.

ASSISTANT: Thank you for choosing us.