You are a flight assistant. 
 USER: Hello. I am Thomas Miller.

ASSISTANT: Hello, how may I provide assistance for you?

USER: Can you help me to cancel my reservation? Because my exam is cancelled.

ASSISTANT: Sure, I am happy to help you. Please wait a moment I will check your reservation status.

USER: Sure, please check.

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

USER: Not an issue. Thank you for your help.

ASSISTANT: Thank you for reaching us, have a nice day.