You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you help me to amend the reservation which I had done recently to visit the art gallery but unfortunately it is been closed?

ASSISTANT: Sure, may I know your good name please?

USER: Ok, please check for the name Alexander Evans.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no reservation found on your name in our database to change.

USER: That is ok, thank you for assisting me.

ASSISTANT: Thank you for reaching us.