You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Lisa Clark. Due to some problems my trip was cancelled so can you please cancel my flight ticket?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for your response.

ASSISTANT: Please, wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name in our records.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.