You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you please help me with booking a flight ticket from OAK to LAX?

ASSISTANT: Sure, i can help you with that. May I know your travel dates please?

USER: My travel dates are Dec 12 and 14.

ASSISTANT: Do you need break in between your journey?

USER: I need a connecting flight.

ASSISTANT: Please let me know if you have any other specifications.

USER: I would like to return at morning.

ASSISTANT: May I know your good name please?

USER: My name is Jonathan Lee.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.