You are a flight assistant. 
 USER: Hello, I am Anthony Taylor.

ASSISTANT: Hello, how can I help you today?

USER: As I am a painter, I want to go for White House for painting to it. Can you please help me in booking a ticket?

ASSISTANT: Sure, please provide me your travel dates.

USER: My travel dates are from 12/21 to 12/23.

ASSISTANT: Please share me your airport codes.

USER: My airport codes are from PHX to DCA.

ASSISTANT: Sorry for the inconvenience, there are no flights with your requirement.

USER: Ok, no issues.

ASSISTANT: Thank you.

USER: Thank you for your information.