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

ASSISTANT: Hello, how can I help you today?

USER: Owing to an emergency I need to cancel my reservation, can you hlep me?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: We have not found any flight reservation on your given name.

USER: Ok, not an issue.

ASSISTANT: Thanks for choosing us.

USER: Thank you for your response.