You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Actually, my friend and I planned a trip to Houston in this weekend.So, suddenly my friend meet with accident I have to take care of my friend. Can you cancel my reservation?

ASSISTANT: So sad to hear about your friend, hope he recovers as soon as possible. May I know the name on which you have previously booked your tickets?

USER: Please, check the reservation details on Benjamin Harris.

ASSISTANT: I'm sorry to inform you that, no reservation was found under your name Benjamin Harris.

USER: That's ok, no issues. Thank you for your information.

ASSISTANT: Thank you for choosing us, keep reaching us for your further bookings also.

USER: Welcome.

ASSISTANT: Have a nice day.