You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I want to change my existing reservation due to my health issues, can you please help me with this?

ASSISTANT: Sure, I'm happy to help you with that. May I know your good name please?

USER: My name is Amanda Johnson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Amanda Johnson, there is no active reservation found under your name to do modifications in that.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.