You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Donna King.

ASSISTANT: How can I assist you?

USER: I planned to attend for a meeting in HOU, can you please help me to book a flight ticket from OAK?

ASSISTANT: Sure, can I know the travel dates please?

USER: I prefer to travel on Jun 7 and Jun 9.

ASSISTANT: Can I know the departure and return time please?

USER: I prefer to depart in afternoon.

ASSISTANT: May I know the connection limit please?

USER: I would like to travel in a connecting flight.

ASSISTANT: Do you have any requirements?

USER: No.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your time.