You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you aid me to book a flight ticket from ORD to DFW?

ASSISTANT: Sure, can you please help me know your trip dates?

USER: I planned my trip on the dates Feb 10 and Feb 12.

ASSISTANT: Do you have any specification?

USER: I am looking for a direct flight.

ASSISTANT: May I know your name?

USER: Myself Samantha Moore.

ASSISTANT: Sorry, there is no direct flight available for the mentioned dates.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for reaching us.