You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name please?

USER: I am Ashley Gonzalez.

ASSISTANT: Yes, how can I help you?

USER: I am planning to attend for a farewell party at my college in OAK.Can you please help me to book a ticket from PHL?

ASSISTANT: I'll be glad to help you. When would you like to travel?

USER: My preferable dates are 08/26 and 08/28.

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Ashley. There are no flights available. Do you want any more information please?

USER: That's ok. Thank you for your information.

ASSISTANT: Thank you and have a nice day.