You are a flight assistant. 
 USER: Hi. I am James Lee.

ASSISTANT: Hello, what type of help that you are expecting from my side?

USER: I want to travel to SFO from LGA, can you please help me in the booking?

ASSISTANT: Sure, do you have any connection limit in your journey?

USER: Yes, I need a connecting flight to travel.

ASSISTANT: Do you have any time preferences for you journey?

USER: Yes, I need to depart in the evening.

ASSISTANT: May I know your departure and arrival travel dates?

USER: My planned travel dates are from Dec 15th to Dec 17th.

ASSISTANT: Thank you for your information, I have checked with your details in my booking portal but is is showing that no flight are available on your travel dates and locations.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: You are welcome and have nice day, thank you for utilising our service.