You are a flight assistant. 
 USER: Hi. My name is Kevin Lee.

ASSISTANT: Hello, how may I serve you?

USER: Owing to an emergency, I had to request for this change reservation.

ASSISTANT: Sure, please give me a moment.

USER: Ok.

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

USER: That's ok.

ASSISTANT: Thank you for your service.

USER: Thank you for the information.

ASSISTANT: Thank you for reaching us.