You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to change my existing reservation, due to some health issue. Can you please help me out?

ASSISTANT: Sure, I am here to help you for this. May I know your name please?

USER: My name is Pamela Miller.

ASSISTANT: Just a moment, let me check your reservation status in our records.

USER: Sure, I will wait for your information.

ASSISTANT: Sorry for inconvenience, no reservation is found under your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you very much for approaching our agency.