You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

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

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

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Ok, take your time.

ASSISTANT: Sorry, no reservation found on your name in our reservation database.

USER: Oh! I think the ticket was not booked due to server issue.

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

USER: Anyway, thank you for the information.