You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Myself Jack Campbell. I want to cancel my flight ticket due to some problems I am unable to travel in flight so can you please cancel my flight ticket?

ASSISTANT: Sure, I am glad to help you with that.

USER:  Thank you for your positive response.

ASSISTANT: Please give me a moment to check your reservation status.

USER: Ok,.

ASSISTANT: Thank you waiting. Sorry Campbell, we couldn't find any reservation on your name to cancel.

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

ASSISTANT: Thank you for reaching us.