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

ASSISTANT: Hello, how can I assist you today?

USER: I need to book a flight ticket from PHL to OAK, can you please help me in booking?

ASSISTANT: Sure, I will help you with this. Can you please provide your journey dates?

USER: My journey dates are, depart on Nov 02 and return back on Nov 04, I need a return flight in the afternoon.

ASSISTANT: Do you need any halt in this journey?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Wait a moment please.

USER: Ok.

ASSISTANT: Jack Smith, we regret to inform you that there are no flight services is available with your request of return flight in the afternoon time on this route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for opting us.