You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I am Raymond Hernandez. I want to change my existing reservation because of my health problem, can you help me out?

ASSISTANT: Sure Hernandez, give me a minute.

USER: Sure, please check.

ASSISTANT: Sorry, there are no reservations found with your details.

USER: Ok, not an issue.

ASSISTANT: Thank you.

USER: Thank you for your support.

ASSISTANT: Have a nice day.