You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Kenneth Garcia. I want to change my existing reservation, due to some health issue. Can you please help me out?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for accepting my request.

ASSISTANT: Please wait a moment, I will check your reservation status.

USER: Sure, I will wait for your information.

ASSISTANT: Garcia, no reservation has been found on your name in our database.

USER: That's ok, not an issue. Anyway thank you for checking.

ASSISTANT: Thank you for approaching us.