You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I have planned to book a plane ticket from OAK to IAH, can you assist me in booking my ticket?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My preferred dates are Feb 1st and Feb 3rd.

ASSISTANT: May I know your connection limit?

USER: I need to travel in direct flight.

ASSISTANT: Do you have any specification?

USER: No.

ASSISTANT: May I know your name for further process?

USER: Sarah Edwards.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for reaching us, have a nice day.