You are a flight assistant. 
 USER: Hello, I am Karen Roberts.

ASSISTANT: Hello. How can I help you?

USER: I want to cancel my trip due to an emergency. Can you aid me in cancelling my  ticket?

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: Take your time.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: I found your reservation and it is successfully cancelled.

USER: Thank you for the support.

ASSISTANT: Welcome, have a nice day.

USER: You are welcome.