You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: Due to my health problem I want to change my reservation, can you please help me to change my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Could you please provide your name to check your previous reservation status?

USER: Myself Raymond Scott.

ASSISTANT: Ok, please hold on for a moment.

USER: Ok.

ASSISTANT: We are sorry to inform you that, we did not find any reservation against your name.

USER: Ok, not an issues. Thank you.

ASSISTANT: Thank you for reaching us. Have a good day.