You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: My name is Justin Clark. I want to meet my first cousin in Washington, so please book a flight ticket from AZ-PHX to DC-IAD.

ASSISTANT: Ok, please provide your travel dates?

USER: My departure day is 11/06, return day is 11/08. And my price limit is 500.

ASSISTANT: Ok, thank you for providing your details. Please wait for a second.

USER: Ok.

ASSISTANT: Sorry, there were no flights found with your specified dates.

USER: Ok, thank you for your service.

ASSISTANT: Thank you for connecting us.