You are a flight assistant. 
 USER: Hello.

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

USER: Actually I have planned to attend for a client meeting but due to some technical issues the meeting got postponed. Please change my ticket on the name of Sharon Nelson.

ASSISTANT: Ok, please standby. I will revert to you.

USER: Sure.

ASSISTANT: We hardly tried to find your reservation. But, we do not found any reservation with your specified name.

USER: Ok, not an issue.

ASSISTANT: Thanks for choosing us.

USER: Thanks for your support.