You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: My visit to the Planetarium has been postponed, due to some technical issues. This is the reason, I want to change my reservation with the name of Carol Adams.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT:  Sorry, no reservation was  found on your name.

USER: No, problem. I will check with another option.

ASSISTANT: Thank you, have a nice day.

USER: Thank you for your information.