You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I want to change my reservation, can you please help me with that?

ASSISTANT: Ok, I am here to help you with that. Meanwhile may I know your name?

USER: Charles Gonzalez here.

ASSISTANT: Please wait for a while I will check and let you know about your reservation status.

USER: Sure.

ASSISTANT: Thank you for waiting and sorry, no active reservation found on your name.

USER: No issues, thank you for the information.

ASSISTANT: Most welcome, have a nice day.