You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: Karen Campbell here. Could you book my ticket from DTW to LGA?

ASSISTANT: May I know your trip dates?

USER: My trip dates are Jan 16 and Jan 18.

ASSISTANT: Do you need any halt in your journey?

USER: I need 1 halt.

ASSISTANT: Thanks for your time, there are no flights available based on your requirements.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.