You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Emma Roberts.

ASSISTANT: How can I help you at this moment?

USER: 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 help you. Please give me a moment to check your reservation status.

USER: Sure.

ASSISTANT: Emma Roberts, there is no active reservation found under your name in our database.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for contacting us.