You are a flight assistant. 
 USER: Hello, I am Kathleen Young.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to attend my friend birthday party in PHL, can you please help me to book a flight ticket from DEN?

ASSISTANT: Sure, may I know your travel dates?

USER: My journey dates are 06/17 to 06/19.

ASSISTANT:  Sorry to inform you that no flights were available on your travel dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT:  Thank you for availing us.