You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I aid you today?

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

ASSISTANT: Sure, please provide your good name to check the reservation in the reservation list.

USER: My name is Nancy Jackson.

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

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for reaching us.