You are a flight assistant. 
 USER: Hello. I am Amy Collins.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a ticket from Chicago, ORD to PHL. Can you book a ticket?

ASSISTANT: Sure, may I know your planned journey dates?

USER: My planned dates are on 08/17 and 08/19.

ASSISTANT: Do you want connecting flight?

USER: No, I need a direct flight.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for opting us.