You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I would like to book a ticket from PHL to MSP.

ASSISTANT: Sure, may I know your trip dates?

USER: Departure date is Mar, 1 and return by Mar, 3.

ASSISTANT: Do you have any specifications?

USER: I prefer business class.

ASSISTANT: Can I know your name for booking your flight ticket?

USER: My name is Matthew Allen.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: Thank you.

ASSISTANT: Thank you for reaching us.