You are a flight assistant. 
 USER: Hello, I am Emma Robinson.

ASSISTANT: Hello, what can I aid you at this moment Robinson?

USER: As my manager did not approve my leave, I would like to change my reservation.

ASSISTANT: Yes, I will help you about it. Give me a moment to check the existing flight under your name.

USER: Ok, take your time.

ASSISTANT: Sorry Robinson, there is no reservation under your name to change.

USER: That's ok, thank you.

ASSISTANT: Ok, thank you for reaching out here. Hope you have a gleeful day ahead.

USER: Welcome.