You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I would like to change my reservation due to some health issues, can you please help me with that?

ASSISTANT: Sure, can I know your name please to proceed further?

USER: Sure, myself Emily Baker.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no problem. Anyway thank you for checking out.

ASSISTANT: Thank you for approaching us.