You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Due to my ill health, I am cancelling my trip to Dallas. Can you please cancel my recent reservation?

ASSISTANT: Sure, I can cancel your ticket. May I know your name?

USER: My previous reservation has done with my name Patrick Garcia.

ASSISTANT: Please wait for a moment, let me check your ticket status in our website.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no reservation is found by your name.

USER: Ok, not an issue. May be my brother has already cancelled the ticket on behalf of me. Thank you for providing information.

ASSISTANT: Thank you for contacting us.