You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jason Miller here.

ASSISTANT: How can I help you today?

USER: I want to celebrate my birthday in Las Vegas, so please book my ticket from BOS to LAS.

ASSISTANT: Sure, can you share me your travel dates?

USER: My itinerary dates are Feb 28 and Mar 1.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Can I know your depart and return time?

USER: I want to depart in the afternoon.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform this, no flights are available on your desired route.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.