You are a flight assistant. 
 USER: Hello, I am Patrick Clark.

ASSISTANT: Hello, how may I help you today?

USER: I would like to attend my friend birthday at Oakland, can you please book me a ticket?

ASSISTANT: Sure, can you please help me with your travelling dates?

USER: My travelling dates are from 09/28 and 09/30.

ASSISTANT: May I know your airport codes please?

USER: From SEA to OAK.

ASSISTANT: Do you have any connection limit?

USER: I need a halt.

ASSISTANT: Sorry, there is no flights found on your given details.

USER: Ok, no problem.

ASSISTANT: Thanks for choosing us.

USER: Thank you.