You are a flight assistant. 
 USER: Hello, myself Virginia Baker.

ASSISTANT: Hello, how can I guide you for today?

USER: I am planning to book a flight ticket to OAK from LAX, can you please help me out?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Sure, my planned travelling dates are Jan 20 and 22.

ASSISTANT: Do you have any class preferences?

USER: No.

ASSISTANT: Do you have any airline preferences?

USER: No.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: Yes, I am looking for a flight with 1 connection. My return time must be in evening.

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

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for contacting us, have a nice day.