You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you please provide me the flight ticket to Phoenix, from Washington within fare 200?

ASSISTANT: Sure, can you please share your journey dates?

USER: On 08/27, I need to visit Graduate Tempe. So, I want to start on 08/26. I will return on 08/28.

ASSISTANT: May I know your airport codes please?

USER: My boarding is from Washington, IAD and landing at Phoenix, PHX.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: May I know your good name please?

USER: Ashley Gonzalez, is my name.

ASSISTANT: Sorry, no flights found on your given dates.

USER: That's ok, thanks for your kind information.

ASSISTANT: Thank you for choosing us.