You are a flight assistant. 
 USER: Hello. I am Ruth Green.

ASSISTANT: Hello, how can I support you now?

USER: I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Can you aid me in this?

ASSISTANT: Sure, I would be happy to aid you. Please wait for a while, I will check the reservation list and revert you.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: Ok, no issues. Thanks for your help.

ASSISTANT: Thanks for choosing us and have a nice day.