You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for today?

USER: I am Donna Rodriguez. I would like to book a ticket from LAS to SFO, can you please help me out?

ASSISTANT: I am glad to help you in booking your flight ticket Donna Rodriguez. Can you please provide your planned dates of journey?

USER: I am travelling on these dates Nov 2nd and 4th.

ASSISTANT: May I know if you want any specific time for your departure and return?

USER: I prefer return time in the evening.

ASSISTANT: Do you have any preference about the connecting limit for your journey?

USER: I need a single connected flight.

ASSISTANT: Sorry to say this Donna Rodriguez, there are no flights to your region as per your requirements.

USER: Ok no problem, thank you for your kind services.

ASSISTANT: You are welcome, thank you for reaching us.