You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Jonathan Nelson. Can you please help me in booking my flight ticket on 01/26 and 01/28?

ASSISTANT: Yes, can you share me your nearest airport codes?

USER: My travelling airport codes are PHL to AUS.

ASSISTANT: Give me a moment. Sorry to inform you that there are no flights found.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for reaching us.