You are a flight assistant. 
 USER: Hello,. I am Jessica Mitchell.

ASSISTANT: Hello, how can I aid you?

USER: I am planning to visit Arizon Desert at Phoenix from Washington.

ASSISTANT: Ok.

USER: Can you please help me to book a flight ticket within fare of 500?

ASSISTANT: Sure, I will help you. Please share me your airport codes?

USER: My airport codes are from DCA to PHX.

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are from 03/28 to 03/30.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Thanks for being on hold. Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: Ok, no problem.

ASSISTANT: Thank you for availing us, have a good day.

USER: Thanks for your valuable information.