You are a flight assistant. 
 USER: Hi, I am Frank Roberts.

ASSISTANT: Hello, how shall I serve you?

USER: As I am not issued with leave during my journey time, so I want to cancel my reservation.

ASSISTANT: Sure, please wait a while I will check and revert to you.

USER: Ok.

ASSISTANT: Thanks for providing information, we didn't found any reservation with your name.

USER: That's fine, thank you for the response.

ASSISTANT: Thanks for approaching us, have a nice day.