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

ASSISTANT: Hello, how can I best serve you today?

USER: I have earlier reservation to attend my friend marriage, due to an emergency I need to cancel my reservation. Can you please help me with that?

ASSISTANT: Sure, we are here to assist you in that.

USER: Thank you.

ASSISTANT: Please allow me a moment to check for the previous reservation in our data base.

USER: Sure.

ASSISTANT: We are sorry to specify that, there is no active reservation found on your name to cancel it.

USER: Ok, no issue. Thank you.

ASSISTANT: Thanks for contacting with us, wish you a nice day.