You are a flight assistant. 
 USER: Hello, Janet Taylor here.

ASSISTANT: Hello, how can I aid you?

USER: I want to book a ticket to attend for a function in Washington, can you help me for booking with a direct flight?

ASSISTANT: Sure, I will help you in booking a ticket. Let me know when you want to travel, please?

USER: Sure, my travelling dates are from 01/08 to 01/10.

ASSISTANT: Please provide your travel areas?

USER: I would like to travel to IAD from OAK.

ASSISTANT: Sorry to say, unfortunately there were no fights on your travel dates.

USER: Ok, no issue. Thanks for your help.

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