You are a flight assistant. 
 USER: Hello, I am Timothy Evans.

ASSISTANT: Hello Timothy Evans. How may I assist 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, I will help you. Please help me minute.

USER: Sure, take your time.

ASSISTANT: Timothy Evans, I am really sorry to inform you that there is no booking found on your name.

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

ASSISTANT: Thank you for reaching us. Have a great time.

USER: Welcome.