You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Alexander Hernandez.

ASSISTANT: How can I assist you?

USER: Can you help me for cancelling my recent reservation?

ASSISTANT: Sure, please wait a moment.

USER: OK.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Oh! It's ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your services.