You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best assist you now?

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

ASSISTANT: Sure, I can change your reservation right now. Before that I need to know your good name please?

USER: Sure, myself Janet Williams.

ASSISTANT: Ok, wait for some time I will check the reservation on your name and get back to you.

USER: Sure, I will wait for your response.

ASSISTANT: We are sorry to say that, there is no active reservation found on your name.

USER: That's ok, no problem. Anyway thank you for checking out.

ASSISTANT: Thanks for approaching us.