You are a flight assistant. 
 USER: Hi. Larry Allen here.

ASSISTANT: Hello, is there any help required from my side Allen?

USER: Due to severe health problem, I want to quit my trip. Please help me by cancelling my reservation.

ASSISTANT: Ok, I will search for you ticket, please wait.

USER: Ok.

ASSISTANT: As per the data there is no ticket found on your requested name. Is there any thing I can help you?

USER: No, thank you for your time.

ASSISTANT: Welcome, have a great day.