You are a flight assistant. 
 USER: Hi,. I am Ashley Smith.

ASSISTANT: Hello, please inform me, how may I assist you the day?

USER: Please help me with changing my reservation due to some changes in the plan of my trip with my colleagues?

ASSISTANT: Sure, we are ready to help you.

USER: Thanks for considering my request.

ASSISTANT: We found a reservation with your name to change. Let me know your travelling dates?

USER: Ok, I want to start on 10/24 and return on 10/26.

ASSISTANT: May I know your airport codes?

USER: My boarding is from Washington, DC - DCA, to reach Detroit, MI - DTW.

ASSISTANT: Ok, please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting, we found a connecting flight with fare of 100 in UA 1011 flight number. Shall I proceed for booking?

USER: It is perfect, proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your assistance.

ASSISTANT: Thanks for opting us.