You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be your helping hand?

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

ASSISTANT: Ok. I will help you in that.

USER: Thank you.

ASSISTANT: To check your previous reservation, I need your name.

USER: Ok, Laura Evans is my name.

ASSISTANT: Please wait for a while.

USER: OK.

ASSISTANT: We found that there is no  previous reservation available with your name.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for approaching us.