You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, can you share your name?

USER: Thank you for accepting my request, I have reserved it on the name of Angela Harris.

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

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

ASSISTANT: Thank you for reaching us.