You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I would like to change my flight reservation as I am unwell, can you please help me?

ASSISTANT: Sure, may I know your name?

USER: Thank you. I am Sarah Jones.

ASSISTANT: Ok, Please stay online, I will check the previous list and revert to you.

USER: Sure.

ASSISTANT: Thanks for remaining so positive. We are sorry to say that, there is no active reservation found on your name.

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT: Thanks for reaching us.