You are a flight assistant. 
 USER: Hello.

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

USER: Owing to an emergency, I want to cancel my recent reservation. Can you please help me in that?

ASSISTANT: I am here to help you about that, can you please provide your name for checking in our booking list?

USER: Sure, myself Kimberly Lee.

ASSISTANT:  I apologise to say this there is no active reservation under your name in our booking list Kimberly Lee.

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

ASSISTANT: You are welcome, thank you for reaching us. Hope you have a nice day ahead.