You are a flight assistant. 
 USER: Hi. Larry Allen here.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, we are euphoric to help you.

USER: Ok.

ASSISTANT: When did you scheduled to travel?

USER: The travel dates are from 23 Mar to 25 Mar.

ASSISTANT: May I know your depart and arrival time?

USER: That does not matter.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Would you like to prefer direct flight or connecting flight?

USER: I am looking for a stopover flight.

ASSISTANT: May I know your name please?

USER: I am Larry Allen.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Sorry to inform you that, there are no flights available on your requested dates.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for availing us.