You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, Please let me know your name.

USER: My name is Nicole Wright.

ASSISTANT: There is no reservation found with your name.

USER: Ok, no problem.

ASSISTANT: Thanks, have a good day.