You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I serve you?

USER: I want to cancel my recent reservation, due to the wrong reservation done by my brother. Can you help me?

ASSISTANT: Sure, may I know your good name please?

USER: Thank you. I am Alexander Mitchell.

ASSISTANT: Ok, please wait a minute.

USER: Sure, I will wait.

ASSISTANT: Thank you for your time. Unfortunately there is no reservation found matching your name.

USER: Ok, I think the reservation is not done properly. Thank you for helping me..

ASSISTANT: Thank you for approaching us.