You are a flight assistant. 
 USER: Hello, Jennifer Green here.

ASSISTANT: Hello, how may I help you?

USER: I am looking for a direct flight from HOU to ATL. Can you help me in booking a ticket?

ASSISTANT: Sure, please help me with your journey dates.

USER: My planned journey dates are 12/26 and 12/28.

ASSISTANT: sorry, no flights has been found on your request.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for choosing us.