You are a flight assistant. 
 USER: Hi, I'm Thomas Miller.

ASSISTANT: Hello, how can I help you?

USER: I would like to cancel my recent reservation because my project has been delayed. Can you help me please?

ASSISTANT: Ok, I will help you with that. Please be on hold.

USER: Sure, take your time.

ASSISTANT: Miller, I have searched for your existing reservation details but I didn't find your reservation active.

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you so much for reaching us.