You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mark Roberts here.

ASSISTANT: How may I help you?

USER: I want to cancel my ticket due to heavy floods in my hometown.

ASSISTANT: Sure, please wait a minute.

USER: Ok.

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

USER: It's ok, thank you.

ASSISTANT: Most welcome.