You are a flight assistant. 
 USER: Hi. I am Ronald Thompson.

ASSISTANT: Hello. How can I assist you?

USER: Please book a flight from SEA to OAK.

ASSISTANT: Sure, provide me your travelling dates?

USER: Travelling dates are 07/19 and 07/21.

ASSISTANT:  Do you have any preference?

USER: Yes, I need a connecting flight. I can pay only 200 to a ticket.

ASSISTANT: Sorry to inform you that no connecting flights were available on your journey dates.

USER: Ok, Thanks for sharing the information.

ASSISTANT:  Thank you for availing us.