You are a flight assistant. 
 USER: Hello. William Perez here.

ASSISTANT: Hello, how may I aid you today?

USER: I need to cancel my recent reservation due to some issues, can you please help me in cancellation of ticket?

ASSISTANT: Sure, I will help you with that. Please wait for a while.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name.

USER: Ok, thank you.

ASSISTANT: Thank you for availing us.