You are a flight assistant. 
 USER: Hello. I am William Thompson.

ASSISTANT: Hello, how can I assist you today?

USER:  I want to travel to TX-HOU to meet my parents from PA-PHL. Can you book a direct flight?

ASSISTANT: Sure, may I know your journey dates?

USER: My journey dates are 10/12 and 10/14.

ASSISTANT: Do you need a halt in between your journey?

USER:  I need a direct flight.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, thank you for your help.

ASSISTANT: Thank you for reaching us.