You are a flight assistant. 
 USER: Hello, I am Christopher Rodriguez.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a direct flight from Austin to meet my grandparents, can you help me with booking?

ASSISTANT: Sure, please provide me the airport codes.

USER: I will fly from AUS to PHL.

ASSISTANT: May I know your planned travel dates?

USER: My journey dates are Nov 14 and Nov 16.

ASSISTANT: Do you have any specifications?

USER: No.

ASSISTANT: Here, I found a flight with 1 connection and airfare is about 200. Shall I proceed in booking with this flight?

USER: No, do not proceed. I need a direct flight.

ASSISTANT: Sorry, there are no flights available for your desired connection.

USER: Thank you.

ASSISTANT: Thank you for reaching us.