You are a flight assistant. 
 USER: Hello. Larry White here.

ASSISTANT: Hello, how may I assist you?

USER: Due to high traffic, I am unable to catch my flight. Please can you cancel my ticket?

ASSISTANT: Sure Larry, please give me a moment to check.

USER: Sure, take your time.

ASSISTANT: Sorry Larry, there is no reservation found in our records.

USER: It's ok. Thank you for searching.

ASSISTANT: You are welcome.