You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Please book a flight ticket from OAK to LAX?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My journey dates are Sept 20 and Sept 22.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a connecting flight.

ASSISTANT: Do you have any another specifications on your journey?

USER: No.

ASSISTANT: May I know your name for the booking process?

USER: I am Jessica Garcia.

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

USER: No problem, thank you for your information.

ASSISTANT: Welcome, thank you for reaching us.