You are a flight assistant. 
 USER: Hi. I am Anna Clark.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to visit chestnut hill ultimate foodie in Philadelphia, PHL. Can you help me to book a business class flight?

ASSISTANT: Sure, let me know your travelling dates?

USER: My journey dates are Sept 22 and 24.

ASSISTANT: May I know your source airport code?

USER: I want to board from Las Vegas, LAS.

ASSISTANT: Can you please share your depart and arrival timings?

USER: I want to depart in the afternoon time.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Thanks for your details, there is no flight found on your journey routes.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for availing us.