You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you at present?

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

ASSISTANT: Sure, I am here to assist you.

USER: Thank you.

ASSISTANT: Please give me a minute, I will check the reservation on your name and revert to you.

USER: Sure.

ASSISTANT: Thank you for your patience, we did not find any reservation on your given name in our database.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for approaching us.