You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Joshua Young.

ASSISTANT: How can I assist you today?

USER: Can you help me to cancel my reservation?

ASSISTANT: Sure,I will help you on that. Please give me a moment.

USER: Thank you. Sure, please check.

ASSISTANT: Thank you for waiting, there is no reservation found under your name.

USER: That is fine. Thank you for your help.

ASSISTANT: Welcome, have a great day.