You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Due to my ill health, I am cancelling my trip to Dallas. Can you please cancel my recent reservation?

ASSISTANT: Sure, please provide me your name to check the status.

USER: My name is Larry Evans.

ASSISTANT: Evans, there is no reservation found with your details.

USER: Ok, not an issue. May be something went wrong while booking the ticket. Thank you for providing information.

ASSISTANT: Thank you for reaching us.