You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I aid you today?

USER: I am Andrew Lopez.

ASSISTANT: Ok.

USER: I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation.

ASSISTANT: Ok.

USER: Can you please help me with that?

ASSISTANT: Sure. No reservation is done earlier to proceed with change in existing. Thank you.

USER: No issue. Thank you.