You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Helen Thomas.

ASSISTANT: How can I aid you?

USER: Can you help me to cancel my reservation? Because I have a business meeting.

ASSISTANT: Sure, I will help you with that.

USER: Sure, please check my details.

ASSISTANT:  Helen Thomas, we couldn't found any reservation under your name in our database.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for reaching us.