You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

USER: I made a reservation earlier in the wrong date unknowingly, Can you please change my existing reservation?

ASSISTANT: Sure, I am here to help you. Please provide your name to proceed further.

USER: Sure, I am Sandra Jones.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, no reservation was found on your name to change.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you for choosing us.