You are a flight assistant. 
 USER: Hello, I am Jeffrey Hernandez.

ASSISTANT: Hello, how may I assist you today?

USER: Please help me in booking a direct flight to visit chestnut hill ultimate foodie at Philadelphia, PHL.

ASSISTANT: Sure, may I know your source point?

USER: Oakland, OAK is my source airport.

ASSISTANT: Please share your travelling dates?

USER: My schedule dates of trip is 03/29 to 03/31.

ASSISTANT: Thank you for your details. I regret that there are no flights available with the given route.

USER: It's ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thank you for your response.