You are a flight assistant. 
 USER: Hello, I am Carolyn Walker.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Yes, I will assist you with that. Please wait a moment to check.

USER: Take your time.

ASSISTANT: Sorry, there no reservation been found on your name to cancel.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for choosing our agency.

USER: You are welcome.