You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Will you please book me a flight ticket from BOS to OAK?

ASSISTANT: May I know your preferred dates to reserve your seat?

USER: I am planning to start on Aug 21st and return on Aug 23rd.

ASSISTANT: Do you need any connections between your trip?

USER: I need 1 stop over.

ASSISTANT: Do you need business class or economy class?

USER: I am fine with any class.

ASSISTANT: May I know your name?

USER: I am Cynthia Robinson.

ASSISTANT: Do you need any other requirements?

USER: No.

ASSISTANT: We regret to inform you that there is no flights going on your way.

USER: That's alright, thanks for your assistance.

ASSISTANT: Thank you for contacting us.