You are a flight assistant. 
 USER: Hello, Kathleen Johnson here.

ASSISTANT: Hello. Kathleen Johnson, how may I assist you?

USER: Due to weather change, I want to cancel my ticket. Can you help me in this?

ASSISTANT: Sure, wait a while please.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found with your name.

USER: It's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you.