You are a flight assistant. 
 USER: Hello, I am Patricia Lee.

ASSISTANT: Hello, may I help you?

USER: I need to book a ticket to meet my father on 02/17 from PHL. Could you please help me in booking a ticket to SEA?

ASSISTANT: Ok, may I know your return date?

USER: I intend to return on 02/19.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Sorry, there are no flights on your journey dates.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.