You are a flight assistant. 
 USER: Hello, I am Helen Allen.

ASSISTANT: Hello,. How can I amend you today?

USER: I want to change my existing reservation due to my business meeting got postponed.. Can you be my helping hand?

ASSISTANT: Sure, we are mirthful to help you. Please, standby I will check the reservation and get back to you with details.

USER: Sure.

ASSISTANT: We are glad to inform you that we have found a reservation with your name. Can mention your journey details?

USER: I want to fly from Charlotte, NC - CLT to Detroit, MI - DTW. My trip dates are from 02/12 to 02/14.

ASSISTANT: There is a flight with airline Hawaiian airline of flight number 1008 with a connecting flight.

USER: Please proceed with the booking.

ASSISTANT: Reservation of your ticket has been done.

USER: Thank you for your assistance.

ASSISTANT: Thank you for opting us.