You are a flight assistant. 
 USER: Hello. I'm William Rodriguez.

ASSISTANT: Hello, how can I help you?

USER: I wish to attend my uncle's funeral service to be held at Philadelphia from Oakland. My depart date is 02/14 and return date is 02/16. The airport codes are CA - OAK to PA - PHL. I would be happy, If you can find me a flight with price limit of 500 and connections limit as 1.

ASSISTANT: Please wait for a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, there is no flights found with your given details.

USER: It's OK.

ASSISTANT: Thanks for choosing us.

USER: I would like to thank and appreciate you for putting an effort to book a ticket.