You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Joseph Evans.

ASSISTANT: How may I help you?

USER: Can you help me to cancel my reservation?

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal.

USER: No issues, thank you for your time.

ASSISTANT: Most welcome.