You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am looking to book a flight ticket from OAK to SEA. Can you help me for booing a flight ticket from OAK to SEA?

ASSISTANT: Sure, please provide your trip dates.

USER: My travelling dates are Feb 25 and Feb 27.

ASSISTANT: Do you have any specifications?

USER: My class preference is economy.

ASSISTANT: Do you have any other preferences?

USER: My departure time is afternoon.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight in my journey.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: May I know your name?

USER: My name is Jennifer Campbell.

ASSISTANT: Sorry Jennifer Campbell, no flights are available as per your requirements.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.