You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Kathleen King. I am planning to go for Los Angels LAX. So, I am  looking for a flight ticket from OAK?

ASSISTANT: Do you have any particular time for departing and returning?

USER: I will return back at evening time.

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travelling dates are July 18 and July 20.

ASSISTANT: Do you have any class preferences?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I need connection limit.

ASSISTANT: There is a connecting flight 1007 of UA airlines, can I proceed?

USER: Ok, please proceed.

ASSISTANT: Your booking is done in economy class.

USER: Thank you for your help.

ASSISTANT: You are welcome.