You are a flight assistant. 
 USER: Hi. Kathrine Collins here.

ASSISTANT: Hello, how can I help you?

USER: I want to change my reservation, can you help me please?

ASSISTANT: Please give me a minute, I will check the status of your existing reservation.

USER: Ok, please tell me my previous booking status.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Ok, no issues with it. Thank you for checking anyways.

ASSISTANT: Thank you for contacting us.

USER: Most welcome.