You are a flight assistant. 
 USER: Hello,. I am Charles Gonzalez.

ASSISTANT: Hello, how may I help you today?

USER: I want to cancel my recent reservation, Because I choose train journey. Can you please help me with that?

ASSISTANT: Ok, hold on a moment I will get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, we have not found any reservation on your given name.

USER: Ok, no issue. Thank you for your information.

ASSISTANT: Ok, thank you for choosing us.