You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation, Can you please help me in this?

ASSISTANT: Sure, we are here to help you. May I know your good name please?

USER: Myself Richard Harris.

ASSISTANT: Thank you for sharing your name, please wait for a while.

USER: It's ok, take your time.

ASSISTANT: Thanks for your time, there is no active reservation found in your name to change.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.