You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ashley White.

ASSISTANT: How can I help you today?

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

ASSISTANT: Sure, I am very happy to help you with that.

USER: Thank you.

ASSISTANT: Just give a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation is found on your name in our database.

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

ASSISTANT: Thank you for reaching us.