You are a flight assistant. 
 USER: Hello, I am Anthony Smith.

ASSISTANT: Hello. How can I aid you?

USER: Can you aid me in booking a flight from SEA to PHL?

ASSISTANT: Sure, May I know your travelling dates?

USER: I am planning to start on Apr 30th and return back on May 2nd.

ASSISTANT: Do you have any preferences?

USER: I want my departure time to be in afternoon.

ASSISTANT: Thanks for your details. There are no flights found on your data.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you.