You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Brian Jones. Can you please help me to search a flight ticket from the airport Seattle-SEA to Philadelphia-PHL?

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

USER: Thank you. I am willing to travel on the dates of Oct 07 and Oct 09.

ASSISTANT: Do you have any specifications? Sorry, there are no flights available for your desired dates.

USER: It's ok, not a problem. Thank you for checking the flight availability.