You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What help that I can assist you right now at this moment?

USER: I want to visit LGA so please book a flight from SEA.

ASSISTANT: Sure, I am glad to assist you with flight ticket booking. Can you please provide your journey dates?

USER: My planned trip dates will be Mar 22 to Mar 24.

ASSISTANT: Is there any time preferences that you have?

USER: No.

ASSISTANT: Are you ok with direct flight or do you need any connecting flight?

USER: I will prefer direct flight.

ASSISTANT: May I know your name for documentation purpose?

USER: Justin Green is my name.

ASSISTANT: Let me check with your details in our booking portal, please wait.

USER: Ok.

ASSISTANT: Sorry to inform you that, non of the airlines is providing a flight on your travel dates and locations with your requirements to book the ticket.

USER: That's ok, thank you.

ASSISTANT: You are welcome and thank you for utilising our service.