You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: Due to my ill health, I would like to cancel my recent reservation. Can you help me with this?

ASSISTANT: Sure, I will help you with that. Please wait for a minute. may I know your name please?

USER: My previous reservation has done with the name Dorothy Clark.

ASSISTANT: I am sorry to say that there is no reservation found under your name.

USER: Ok, not an issue. May be something went wrong while booking.

ASSISTANT: Thank you.

USER: Thank you for providing information.