You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: I need to book a flight ticket from OAK to SEA, can you help me in booking a flight ticket?

ASSISTANT: Sure, May I know your travelling dates?

USER: Sure, my scheduled dates are Oct 15 and Oct 17.

ASSISTANT: Do you have any connection limit?

USER: I prefer maximum one connection.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: Sure, Ronald Nelson here.

ASSISTANT: Sorry, there are no flights found with your data.

USER: Ok, no worries at all. Thank you for your assistance.

ASSISTANT: Thank you.