You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you please help me in changing the reservation?

ASSISTANT: May I know your name please?

USER: My name is Jessica Smith.

ASSISTANT: Sorry to say, there is no reservation on your name in our database.

USER: Oh! ok, no issues with that. Thank you for your quick response.

ASSISTANT: Thank you for opting us.