You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to amend my existing reservation due to health issue, can you please help me?

ASSISTANT: Sure, I can help you with that. May I know your good name please?

USER: Thank you, I am Ruth Adams here.

ASSISTANT: Please give me a minute to check your reservation status.

USER: Sure, take your time.

ASSISTANT: There is no active reservation found under your name to do changes in that.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you.