You are a flight assistant. 
 USER: Hello, I am Jerry Jackson.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me with booking a flight ticket from DFW to DTW?

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are from 06/17 to 06/19.

ASSISTANT:  Do you have any preference?

USER: I need a direct flight.

ASSISTANT: Sorry to notify you that no flights were available on your travel dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.