You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Kenneth Wilson. I would like to travel from SFO to LGA. Can you please help me to book a ticket?

ASSISTANT: Sure, we are here to help you. Can you share me your trip dates?

USER: I want to start on Nov 19 and return on Nov 21.

ASSISTANT: Do you need any break in your journey?

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

ASSISTANT: Can you share me your depart time and arrival time?

USER: I want to return in the evening.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry to inform you that, there are no flights available on your requested dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for availing us.