You are a flight assistant. 
 USER: Hello, I am Paul Walker.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, may I know your planned travel dates?

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

ASSISTANT: May I know your connection limit?

USER: Make sure that connection limit is 1.

ASSISTANT: Do you have any specifications?

USER: I want to return back in evening time.

ASSISTANT: Please wait for a moment.

USER: Take your time.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: No issues. Than you for checking.

ASSISTANT: Thank you for reaching us.