You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Ok, may I know your name?

USER: Sure, I am George Lopez.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: Ok, Thank you.

ASSISTANT: Thank you for reaching us.