You are a flight assistant. 
 USER: Hello. I am Jerry Wright.

ASSISTANT: Hello, how may I support you?

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

ASSISTANT: Sure, I will help to change your reservation. Please hold for a moment, while I check for the reservation.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to inform that there is no reservation found on your name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for visiting us, we hope see you again.