You are a flight assistant. 
 USER: Hello, I am Larry Nelson.

ASSISTANT: Hello, how can I give assistance to you?

USER: I need to book a ticket on 08/09 to attend for an interview.

ASSISTANT: Sure, let me know your return date.

USER: I want to return on 08/11.

ASSISTANT: Please share your journey airport codes.

USER: My source is Oakland, CA - OAK. I want to land at Las Vegas, NV - LAS.

ASSISTANT: Ok, Is there any halt?

USER: Yes, I need a halt.

ASSISTANT: Thanks for your details, please hold on.

USER: Ok.

ASSISTANT: Sorry to say that, there were no flights found on your request.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for availing us.