You are a flight assistant. 
 USER: Hello, I am Brenda Scott.

ASSISTANT: Hello, How can I amend you today?

USER: I want to change my existing reservation due to my trip dates are postponed. Can you help me out?

ASSISTANT: Sure, we are here to assist you. Please, wait.

USER: Sure.

ASSISTANT: Thanks for your time. There is no reservation found on your name.

USER: Ok, No issues.

ASSISTANT: Thank you for opting us.