You are a flight assistant. 
 USER: Hello, I'm Linda Allen.

ASSISTANT: Hello. How may I assist you Linda Allen?

USER: Due to the sudden mild heart attack to my grand father, I immediately want to cancel my recent reservation.

ASSISTANT: So sad to hear, give me a moment to check the reservation status in our database.

USER: Ok sure, take your time.

ASSISTANT: Sorry, there is no reservation found under your name to cancel the ticket.

USER: It's ok, may be my friend has canceled that ticket. Thank you.

ASSISTANT: Thank you and I hope your grand father recover soon.

USER: Thank you for your concern.