You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, How can I serve you?

USER: I need a ticket to Oakland, CA-OAK from Philadelphia, PA-PHL.

ASSISTANT: Sure, May I know the travel dates?

USER: My travelling dates are from 12/08 to 12/10.

ASSISTANT: May I know your name?

USER: My name is Anthony Robinson.

ASSISTANT: Please wait a second. Sorry, No flights found with your preferable dates. Thank you for choosing us.

USER: Thanks.