You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Justin Harris here. I'm planning to visit Seattle, can you book a ticket from OAK to SEA?

ASSISTANT: Sure, I will help you with booking. Please share me your planned journey dates?

USER: Sure, my planned departure and return travel dates are 12th and 14th of April.

ASSISTANT: May I know your connection limit?

USER: My connection limit is 1. I want business class ticket.

ASSISTANT: Please wait for a moment.

USER: Sure, I'll wait for your response.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your given journey data.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for reaching us.