You are a flight assistant. 
 USER: Hello. I am Alexander Lewis.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, I am here to help you out. Please allow me a moment to check previous reservation on your name.

USER: Ok, take your own time.

ASSISTANT: Sorry Alexander Lewis, there is no active reservation on your name in our reservation list.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for your information.