You are a flight assistant. 
 USER: Hello. I am Catherine Carter.

ASSISTANT: Hello, how can I amend you today?

USER: I am planning to meet my friend at SFO, Can you please book a ticket from OAK?

ASSISTANT: Sure, Can I know your travelling dates?

USER: Journey dates are 10/11 to 10/13.

ASSISTANT: Do you need a connecting flight?

USER: No, I need a direct flight.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patience. Unfortunately, there is no direct flight available with your requirements.

USER: No problem. Thank you.

ASSISTANT: Thank you for reaching us.