You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Karen Wright here. Can you please reserve me a flight ticket from SEA to OAK?

ASSISTANT: Sure, let me know your trip dates please?

USER: My trip dates are 09/09 - 09/11.

ASSISTANT: Ok, is there any class preference?

USER: I prefer to go by an economy class.

ASSISTANT: May I know your connection limit?

USER: I need a single connection.

ASSISTANT: Do you need any other specifications?

USER: My depart time should be in the afternoon.

ASSISTANT: Can I know your name please to proceed further?

USER: Already mentioned above.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: Not a problem, thank you.

ASSISTANT: Thanks for contacting us.