You are a flight assistant. 
 USER: Hello, I am Jennifer Taylor.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thank you for your time, we did not find any reservation on your name.

USER: No problem, thanks for your service.

ASSISTANT: Thank you for reaching us.