You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for today?

USER: Can you help me to book a direct flight?

ASSISTANT: I am happy to help you in booking a flight ticket, can you please provide your nearest airport codes of journey?

USER: My travelling airport codes are PHL and DCA.

ASSISTANT: Please provide your planned dates of journey.

USER: My travelling dates are Sept 24 and 26.

ASSISTANT: Do you have any other requirement for your journey?

USER: No.

ASSISTANT: Please let me know your name for booking purpose.

USER: My name is Patricia Carter.

ASSISTANT: Sorry Patricia Carter, there are no flights which travels to your region on your planned dates of journey.

USER: No issues, thank you for your time.

ASSISTANT: You are welcome, thank you for reaching us.