You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Patrick Smith.

ASSISTANT: How may I assist you?

USER: Due to heavy work a my office, I would like to cancel my recent reservation.

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

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a good day.