You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, can I have your name please?

USER: Myself Brandon Adams.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Thanks for waiting, there is no active reservation on your given name.

USER: Not a big issue, anyhow thank you very much for checking the reservation status.

ASSISTANT: Thank you for opting us.