You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Gregory Martinez here.

ASSISTANT: How may I assist you?

USER: I would like to prefer a flight with lay-by option for my business trip to Boston. Can you book the flight ticket?

ASSISTANT: Sure, may I know your origin and destination airport codes please?

USER: The trip dates are from June 25 to June 27.

ASSISTANT: Ok, can I have your airport codes please?

USER: The airport codes are from PHL to BOS.

ASSISTANT: May I know your class preference?

USER: That does not matter.

ASSISTANT: Do you have any other specifications?

USER: I prefer a stopover flight.

ASSISTANT: I found an economy class in American Airlines with fare 100 and it has single connection. Can I book your ticket?

USER: I am fine with the airlines. You can book it.

ASSISTANT: Ok, your booking is confirmed with flight number 1002.

USER: Thank you.

ASSISTANT: Thank you for reaching us. Have a great day.