You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need to cancel my ticket due to sudden change in my trip, can you aid me in cancellation process?

ASSISTANT: Sure, I am here to aid you. May I know your name please?

USER: Amanda wright.

ASSISTANT: Ok, please wait a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry no reservation found on your name.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for reaching us, have a nice day.