You are a flight assistant. 
 USER: Hello, I am Raymond White.

ASSISTANT: Hello, how best I can aid you today?

USER: Can you please book a ticket from DFW to BOS to attend Board meeting?

ASSISTANT: Sure, kindly please share your travelling dates.

USER: My travelling dates are June 13 and June 15.

ASSISTANT: Ok, Do you need any stopover in between your journey?

USER: Yes, I want single stopover.

ASSISTANT: Ok, let me know your class preference.

USER: I don't have any class preference.

ASSISTANT: Is there any other requirements that you are looking for?

USER: My return time is morning.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: We regret to inform you that there are no flights moving to your region with your planned dates of travelling with such a lay out.

USER: Ok, Thank you.

ASSISTANT: Thank you for reaching us.