You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Carol Lewis.

ASSISTANT: What can I do for you Lewis?

USER: I had planned to attend an event, but it was postponed. Can you change my recent reservation?

ASSISTANT: Sure Carol Lewis, give me moment I will get back to you.

USER: Ok.

ASSISTANT: Sorry for inconvenience, there is no reservation found on your name.

USER: That's Ok.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your help.

ASSISTANT: You are welcome.