You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you?

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 perky to assist you.

USER: Thank you.

ASSISTANT: Can I know your name?

USER: Myself Elizabeth Martinez.

ASSISTANT: Give me a minute.

USER: Sure, take your time.

ASSISTANT:  Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to change it.

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

ASSISTANT: Thank you for opting us.

USER: Welcome.