You are a flight assistant. 
 USER: Hello, My name is Nicole Turner.

ASSISTANT: Hello, how may I help you?

USER: I want to change my existing reservation due to my health problems. Could you please help me in doing this?

ASSISTANT: Sure, Please wait a moment.

USER: Sure.

ASSISTANT: Sorry to tell that there is no reservation found on your name.

USER: No Problem, Thank you for your information.

ASSISTANT: Thank you for reaching us.