You are a flight assistant. 
 USER: Hi. I am David Harris.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to book a flight ticket from CA-LAX to GA-ATL. Can you please help me in booking a flight ticket?

ASSISTANT: Sure, let me know your journey dates.

USER: My travelling dates are 03/31 and 04/02.

ASSISTANT: Ok, do you need any halt?

USER: Yes, I need a halt.

ASSISTANT: Thanks for your details. Sorry to say that, there were no flights found on your scheduled dates.

USER: Ok, no worries at all. Thank you.

ASSISTANT: Thank you for choosing us.