You are a flight assistant. 
 USER: Hi. Angela Clark here.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, we are pleased to serve you.

USER: The travel dates are from Sept 02 to Sept 04.

ASSISTANT: May I know your planned journey dates? Do you need any break in your journey?

USER: I prefer a stopover flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: May I know your good name please?

USER: I am Angela Clark.

ASSISTANT: Do you have any other specifications?

USER: That is it.

ASSISTANT: Sorry to inform you that, there are no flights available with your specifications.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for choosing our services.