You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

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

ASSISTANT: I will help you with that.

USER: Thank you for your response.

ASSISTANT: May I know your name?

USER: Myself Emma Edwards.

ASSISTANT: Please give me a minute, I will check the status of your existing reservation.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no reservation found under your name in our database.

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

ASSISTANT: Thank you for contacting us, have a nice day.