You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Catherine Hall and I want to change my existing reservation due to the venue change of a copa america football game owing to the bad weather.

ASSISTANT: Sure, please wait a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation on your name.

USER: No issue and thanks for your information.

ASSISTANT: Thanks for connecting us, have a nice day.