You are a flight assistant. 
 USER: Hello. I am Sharon Edwards.

ASSISTANT: Hello, how can I support you today?

USER: I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Can you please help me to change my reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait for a moment, while I check for the reservation.

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: Ok, no problem. Thank you so much.

ASSISTANT: Thank you for visiting us, have a nice day ahead.