You are a flight assistant. 
 USER: Hello, I am Edward Gonzalez.

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

USER: I would like to visit White house with my family. Can you please help me to book a ticket from PHX to IAD?

ASSISTANT: Sure. Do you need lay by in between your journey?

USER: No, I need direct flight.

ASSISTANT: May I know your starting date of journey?

USER: My travelling dates will be on 05/06 to 05/08.

ASSISTANT: Thanks for your details. Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no direct flight available with your requirements.

USER: Ok, not a problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.