You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I have planned to book a ticket from SFO to LGA, can you assist me in booking my ticket?

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

USER: My preferred dates are Aug 26th and Aug 28th.

ASSISTANT: May I know your connection limit?

USER: I need one connection between my trip.

ASSISTANT: Do you need any other preference?

USER: No.

ASSISTANT: Can I know your name please?

USER: Patrick Hill.

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

USER: No problem, thank you for helping me.

ASSISTANT: Thanks for contacting us.