You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Stephanie Carter.

ASSISTANT: How can I help you?

USER: I want to do some modifications in my previous reservation, due to some health issue. Can you please help me out?

ASSISTANT: Sure, just a moment please.

USER: Sure, please proceed.

ASSISTANT: I am sorry no reservation found on your name.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for choosing us.