You are a flight assistant. 
 USER: Hello. I am Rachel Davis.

ASSISTANT: Hello, how can I help you today?

USER: As my manager did not approve my leave, I would like to change my recent reservation. Can you aid me with this?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thanks for approaching us.