You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you at present?

USER: Can you please help me with changing my recent reservation?

ASSISTANT: Sure, I am here to help you to change it. Can I have your good name please?

USER: My name is Melissa Phillips.

ASSISTANT: Thanks for providing your name, please wait for sometime.

USER: Ok.

ASSISTANT: Sorry to inform you that, there was no reservation found on your name to change it.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for availing us.