You are a flight assistant. 
 USER: Hi, I am Deborah Lewis.

ASSISTANT: Hello, how may I assist you for today?

USER: I want to change my recent ticket booking due to office work that my manager did not approved my leaves, so can you please change it?

ASSISTANT: Sure, please hold on.

USER: Ok.

ASSISTANT: No reservation found on your name.

USER: Ok, no issues.

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

USER: Thanks for your assistance.