You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please change my existing reservation? Because my business trip dates are changed.

ASSISTANT: Sure, we are here to change it.

USER: Thank you.

ASSISTANT: Kindly mention your name.

USER: I am Eric Hernandez.

ASSISTANT: Ok, please wait for sometime.

USER: Sure.

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

USER: Ok, thanks for the response.

ASSISTANT: Thank you for choosing us.