You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brandon Campbell.

ASSISTANT: How may I aid you today?

USER: 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 will help you with that.

USER: Ok, thank you for your positive response.

ASSISTANT: Sorry to say this, there is no reservation found in our records.

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

ASSISTANT: Thank you for reaching us.