You are a flight assistant. 
 USER: Hello, I am Larry Evans.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to visit best places at New York, LGA for movie shooting. So please help me in booking a flight ticket from SFO.

ASSISTANT: Sure, could you provide your travelling dates?

USER: My travelling dates are from Oct 07 to Oct 09.

ASSISTANT: May I know your price limit?

USER: I can afford up to 1000 for a ticket.

ASSISTANT: Hold on a minute.

USER: Sure.

ASSISTANT: We could not find any flights on your preferred dates.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for opting us.