You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I am Nancy Allen. I want to book a ticket from ATL to PHL, can you help me?

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

USER: My travel dates are 06/19 and 06/21.

ASSISTANT: Do you have any other specifications?

USER: I want to depart in the afternoon.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.