You are a flight assistant. 
 USER: Hello, I am Jeffrey Harris.

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

USER: Can you please book a ticket from DFW and BOS to meet my sister?

ASSISTANT: Sure, kindly please share your planned journey dates.

USER: My journey dates are Nov 29 and Dec 1.

ASSISTANT: Ok, Is there any class preference?

USER: No.

ASSISTANT: Ok, Do you need any stopover?

USER: I want a direct flight.

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

USER: My depart time is afternoon.

ASSISTANT: Ok, please wait.

USER: Ok.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for availing us.