You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: Can you please help me in booking a flight ticket to JFK from LGA?

ASSISTANT: Sure, May I know your travelling dates?

USER: I am planning to start on Aug 18 and need to return on Aug 20.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Any other preferences?

USER: No, thanks for asking.

ASSISTANT: May I know your name?

USER: I am Gregory Mitchell.

ASSISTANT: Sorry, there are no flights found with your data.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.