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

ASSISTANT: Hello. How can I assist you today?

USER: I want to visit PA - PHL with my friends, can you help me with reservation.

ASSISTANT: Sure, I am here to help you. Let me know your travel boarding point? Along with that ensure your dates of travel?

USER: Sure, my origin is DC - IAD. My depart is on 10/14 and return on 10/16.

ASSISTANT: Sorry to say this, currently we are not providing flights on that particular dates due to weather conditions.

USER: No issues. Thank you.

ASSISTANT: Thanks for approaching us, have a nice day.