You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Cynthia Campbell here. I want to book a flight ticket from BOS to ATL. Can you help me in that?

ASSISTANT: Sure, I am here to help you. Can you share me your trip dates?

USER: Thank you. My trip dates are May 17 to 19.

ASSISTANT: Do you need any way station in your route?

USER: I need halt in between journey.

ASSISTANT: May I know your departure time and arrival time?

USER: My depart time should be at evening.

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

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.