You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can i address you?

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

ASSISTANT: Sure, may I know your name to check the status?

USER: I want to change the reservation which is with the name Kathleen Clark.

ASSISTANT: Ok, please wait for a moment. I will get back to you after checking the reservation list.

USER: Ok, take your time.

ASSISTANT: Thanks for being waiting. Sorry to inform you that there was no reservation found on your name.

USER: No issues, thanks for the information.

ASSISTANT: Thank you for selecting us.