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 so, I want to change my existing reservation. Can you please help me with that?

ASSISTANT: Sure, I can help you with that.

USER: Thank you for accepting my request.

ASSISTANT: Can I have your name to check your reservation?

USER: My name is Dorothy Jackson.

ASSISTANT: Please wait for some time, I will check your reservation status and revert to you.

USER: Sure.

ASSISTANT: We are sorry to inform you that, we did not find any reservation against your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us, hope to serve to again.