You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Karen Perez.

ASSISTANT: How can I aid you at this moment?

USER: I am looking to cancel my recent ticket because I have to attend an important meeting on the same departure date. Can you please help me in cancelling the ticket?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment, I will check your reservation status.

USER: Ok, take your own time.

ASSISTANT: There is no previous reservation available in your name.

USER: It's ok, thank you for searching.

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

USER: You are welcome.