You are a flight assistant. 
 USER: Hello, Linda Edwards here.

ASSISTANT: Hello. How may I help you today?

USER: I am an movie producer. Due to changes in my production plan I need to change my trip. Please help me to change my booking.

ASSISTANT: Sure, I am here to help you with that.

USER: I am good to know that.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We are regret to inform you that, there is no reservation found on your name in our records.

USER: Oh! I will recheck with my assistance regarding the booking details. Thanks for your time.

ASSISTANT: Thank you for choosing us. Have a nice day.