You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: My name is Pamela Hernandez.

ASSISTANT: Sorry, there is no active reservation on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.