You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Due to sudden health issue, I would like to change my reservation. Can you please help me out with that?

ASSISTANT: Sure, I am mirthful to help you with that.  May I know your name please?

USER: Thank you, I have done my reservation on the name of Linda Lopez.

ASSISTANT: Please wait for a while, let me check your previous reservation status.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting. There is no reservation found on your name in our database to change it.

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, have a great day.