You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I serve you?

USER: I am Laura Mitchell, my family tour can postponed, so I want to change my existing reservation.

ASSISTANT: Sure, please wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. We found that there was no reservation found with your name.

USER: Ok, not an issue. Thank you for your quick response.

ASSISTANT: Thank you for opting us.