You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Samuel Wilson here.

ASSISTANT: How can I aid you?

USER: Can you book a flight ticket for my airport codes that is from SEA to LGA?

ASSISTANT: Sure, may I know the planned travel dates?

USER: The travel dates are from Sept 16 to Sept 18.

ASSISTANT: Please provide me the specifications.

USER: I prefer a stopover flight.

ASSISTANT: Do you have any other specifications?

USER: I am looking for a business class.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for reaching us.