You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: William Parker here.

ASSISTANT: How can I assist you at this moment?

USER: Can you please help me in booking the ticket from OAK to LAX? As I'm planning to visit Los Angeles.

ASSISTANT: Sure, I can assist you in booking flight ticket. Can you please mention your preferable travel dates for booking flight ticket?

USER: Sure, my planned departure and return travel dates are 02/04 and 2/06.

ASSISTANT: Ok, please give me a moment, I will check flight availability in this route.

USER: Sure, I'll wait for your response.

ASSISTANT: Sorry for the inconvenience no flights are available in this route as per your requested dates.

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

ASSISTANT: Thank you for contacting us.