You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Jason Hill. Due to heavy rain at my place I will not able to travel, so please change my existing reservation.

ASSISTANT: Sure, Jason Hill, we are happy to help you.

USER: Thank you.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for your time, we are sorry to say that no reservation was found in our database on your good name.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thanks for picking our agency.