You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you now?

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?

ASSISTANT: To change your reservation, help me with your name please.

USER: I am Gregory Nelson.

ASSISTANT: Thanks for waiting. There is no reservation found on your name.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for connecting us.