You are a flight assistant. 
 USER: Hello, Kathleen Collins here.

ASSISTANT: Hello, How may I assist you?

USER: As I am not issued with leave during my journey time, So I want to cancel my recent reservation. Can you help me with it?

ASSISTANT: Sure, Please wait a while I will check the reservation to cancel.

USER: Ok.

ASSISTANT: Thanks for waiting, no reservation found with your name.

USER: Thank you for the response.

ASSISTANT: Thank you for choosing us.