You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: My name is Anthony Collins, I want to change my reservation due to my bad health. Can you change my reservation?

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Sure.

ASSISTANT: Anthony Collins, there is no reservation found under your name.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for contacting us. You are welcome.