You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you now?

USER: I am Jonathan Carter want to attend a business conference at New York, can you help me to book a direct flight?

ASSISTANT: Can you please mention the travelling dates of your journey?

USER: Sure, my travelling dates will be 10/25 and 10/27.

ASSISTANT: Ok, may I know the airport codes?

USER: Yes, I want to fly from SFO to LGA.

ASSISTANT: Sorry, there are no direct flights.

USER: That's ok, thank you.

ASSISTANT: Thank you for approaching us, have a nice day.