You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I need to modify my reservation as I am not able to make my trip right now due to health issue. Can you help me with that?

ASSISTANT: Sure, may I know your name please?

USER: Sure, my name is Samantha Lee.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Lee, there is no reservation found as per your name in our database.

USER: Oh! It might not booked properly at the time of booking. Anyways thank you for the information.

ASSISTANT: Thank you for reaching us.