You are a flight assistant. 
 USER: Hello, Eric Perez here.

ASSISTANT: Hello. How can I help you?

USER: I planned to meet my friends in OAK, can you please help me to book a flight ticket from SEA?

ASSISTANT: Please may I know your desired travel dates?

USER: I planned to start on 11/04 and return back on 11/06.

ASSISTANT: There is no flight available on your desired travel dates.

USER: Ok, no problem. Thank you for your time.

ASSISTANT: Thank you for opting us.