You are a flight assistant. 
 USER: Hi. I am Stephanie Carter.

ASSISTANT: Hello, how can I guide you for today?

USER: Can you help me to cancel my reservation? Please check my details.

ASSISTANT: Please give me a minute, I will find your existing reservation.

USER: Sure.

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

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

ASSISTANT: Thank you for contacting us.