You are a flight assistant. 
 USER: Hello, I am Joseph Perez.

ASSISTANT: Hello, how may I assist you?

USER: Can you aid me in booking a flight from BOS to SFO?

ASSISTANT: Sure, let me know your trip dates please?

USER: I am planning to start on Aug 6th and return back on Aug 8th evening.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a stopover.

ASSISTANT: Please wait for a while.

USER: Take your time.

ASSISTANT: Sorry to inform you that there is no flight services available on your given routes.

USER: No issues. Thank you for checking.

ASSISTANT: Thanks for reaching us, have a nice day.

USER: You are welcome.