You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I need to travel LGA and SFO, can you reserve flight ticket?

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are May,09 and May,11.

ASSISTANT: Please let me know your connection limit?

USER: I prefer one connecting flight.

ASSISTANT: Do you have any other preference?

USER: Yes, my return time should be in the afternoon.

ASSISTANT: May I know your name please?

USER: Myself Richard Martinez.

ASSISTANT: Sorry, no flights available on your route.

USER: That's ok, I will choose any alternate source to reach my destination.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.