You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Myself Sharon Jones. I need to change my existing flight due to my health is not well, can you please help?

ASSISTANT: Sure, give me a minute.

USER: Please take your time.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: That's ok, thank you for searching details.

ASSISTANT: Thank you for reaching us.