You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: I want to book a flight ticket to attend an cultural event which is going to held at NV. Can you help me?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: 09/06 and 09/08 are my travelling dates.

ASSISTANT: Ok, may I know your origin location airport code?

USER: I would like to start from OAK.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Ok, do you have any other specifications?

USER: I would like to return in the evening.

ASSISTANT: Sorry, there is no flight with your requested time.

USER: No issue. Thank you.

ASSISTANT: Ok, could I have your name please for documentation purpose?

USER:  Sure, Lisa Carter here.

ASSISTANT: Thank you for choosing us.