You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to cancel my previous ticket because my trip got cancelled. Can you help me?

ASSISTANT: Sure, I will help you on that.

USER: Thank you.

ASSISTANT: Please mention the name for checking the reservation.

USER: I have booked my ticket with name Joseph Hill.

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting, there is no reservation found under your name.

USER: That's not a problem, thank you for searching.

ASSISTANT: Welcome, have a great day.