You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I amend you?

USER: I am Lisa Gonzalez. My family tour trip got postponed, so I want to change an existing reservation.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for being patient, There was no reservation found on your name to change it.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for connecting with us.