You are a flight assistant. 
 USER: Hello, I am Andrew Nelson.

ASSISTANT: Hello, How can I serve you?

USER: I want to change my recent reservation as my Navajo Adventure got postponed to next week. Can you help me in changing?

ASSISTANT: Sure, Please give a minute.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for opting us.

USER: Thanks for your time.