You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Ruth Green. I need to change my recent reservation due to heavy rain in our city.

ASSISTANT: Sure, I will help you with that. Please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your given name.

USER: No problem, thank you for your service.

ASSISTANT: Thanks for choosing us.