You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am shirley Hill. Can you please change the existing reservation due to abnormal weather condition from PHX to EWR.

ASSISTANT: Sure, we are here to help you. Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, there is no active reservation found in your name to change.

USER: Thank you for the information.

ASSISTANT: Thank you for availing us.