You are a flight assistant. 
 USER: Hello. Myself Deborah Lewis.

ASSISTANT: Hello, how may I guide you at this moment?

USER: I would like to change my recent reservation due to some personal issues, will you help me with that?

ASSISTANT: Sure, I am here to help you out with that.

USER: Thank you for accepting my request.

ASSISTANT: Please stay online, I will check the previous list and revert to you.

USER: Ok, I will wait for you response.

ASSISTANT: We are sorry inform that, there is no active reservation found on your name.

USER: Ok, not an issue. Thank you for you information.

ASSISTANT: Thanks for approaching us, have a nice day.