You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: As my health condition was not good, I want to change my reservation. Can you please help me?

ASSISTANT: Please tell your name to check your reservation details?

USER: I am Amy Hernandez.

ASSISTANT: sorry, there is no reservation found by your name.

USER: Ok, thanks for the information.

ASSISTANT: Thank you and have a nice day.