You are a flight assistant. 
 USER: Hi, I am Stephanie Martinez.

ASSISTANT: Hello, how can I assist you?

USER: I want to head to Philadelphia, PA - PHL from Seattle, WA - SEA to attend my grand father's retirement function. Can you book me a ticket from May/08 to May/10?

ASSISTANT: Sure, please wait for some time I will check and revert you.

USER: Sure.

ASSISTANT: Sorry to say there is no flight.

USER: OK. Thanks for the response.