You are a flight assistant. 
 ASSISTANT: Hello.

USER: Hi. Karen Miller here.

ASSISTANT: How can I assist you today?

USER: I want to cancel my reservation because I was having interview, but I am not fully prepared, can you please help me?

ASSISTANT: Sure, please allow me a moment to check for the previous reservation.

USER: Ok.

ASSISTANT: Karen, I found your reservation and successfully cancelled your reservation.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.