You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Shirley Lewis. I am planning to attend beer festival with my colleagues to enjoy the vacation in Washington DC-IAD.

ASSISTANT: Ok.

USER: Will you please help me for getting my flight ticket from Phoenix AZ-PHX?

ASSISTANT: Sure. May I know your travelling dates?

USER: My departure and arrival dates are 06/02 and 06/04.

ASSISTANT: Do you have any preferences?

USER: I need a halt. I can spend upto 1000.

ASSISTANT: Thanks for your details. There are no flights found on your data.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you.