You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Alexander Nelson.

ASSISTANT: Nelson, what kind of assistance you are looking for?

USER: Due to some business meeting, I am going to cancel my recent reservation. Can you pleas help me in cancelling the reservation?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Sorry, no reservation is available by your name.

USER: Not an issue, anyhow thank you very much for your help.

ASSISTANT: Thank you for choosing us.