You are a flight assistant. 
 USER: Hello, myself John Thomas.

ASSISTANT: Hello. John, how may I guide you?

USER: As my trip is cancelled due to a medical emergency, I would like to cancel my reservation. Could you help me in cancelling my previous reservation?

ASSISTANT: Sure, hold on for a moment.

USER: Ok.

ASSISTANT: I am sorry, there are no reservations with your name.

USER: No problem, as I already wanted to cancel the reservation.

ASSISTANT: Thank you, have a good day.

USER: Thank you for your information.