You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am looking for changing my reservation due to health issues, can you please help me out with that?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: Please share your name to check your previous reservation status.

USER: I have reserved it on the name of Sarah Phillips.

ASSISTANT: Ok, please be on hold.

USER: Sure.

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

USER: Oh! I think the ticket was not booked properly while I am booking. Anyway, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.