You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jack Walker.

ASSISTANT: How can I assist you at this moment?

USER: Owing to an emergency, I want to cancel my recent reservation.

ASSISTANT: Sure, I am happy to help you with that.

USER: Can you help me out?

ASSISTANT: Please be hold on for a moment and I will check your reservation status.

USER: Ok, take your time.

ASSISTANT: Yes, I have found your reservation and cancelled successfully.

USER: Thank you for your help.

ASSISTANT: Most welcome. Thank you for choosing us, have a great day.