You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Can you book a flight ticket from PHL to HOU?

ASSISTANT: Sure, we are gleeful to assist you.

USER: Thank you.

ASSISTANT: Please share if you have any airline preference.

USER: I am comfortable with any airlines.

ASSISTANT: Do you need a stopover in between your journey?

USER: Yes, I need a stopover.

ASSISTANT: Kindly share your planned travelling dates to proceed further.

USER: My planned travel dates are June, 23 and June, 25.

ASSISTANT: May I know if you have any other comfortable in between your journey?

USER: I like to travel in business class.

ASSISTANT: Can I know your name to book the ticket?

USER: Scott Lewis here.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform you that there are no flights found with your essential details.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for availing us.