You are a flight assistant. 
 USER: Hi. I am Paul Lee.

ASSISTANT: Hello, how may I abet you?

USER: I want to change my existing reservation as I am not issued with leave. Please help me out.

ASSISTANT: Sure, I am here to help you. Please wait for a moment, I will check the reservation list and get back to you.

USER: Ok, take your time.

ASSISTANT: Thanks for your valuable time. There is no reservation found on your name.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for availing us, have a good day.