You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you today?

USER: I am Sandra Thompson. I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation,.

ASSISTANT: OK.

USER: Please help me out.

ASSISTANT: Please wait a moment.

USER: Ok, take your time.

ASSISTANT: We found a reservation on your name. Please share your travelling dates?

USER: My travelling dates are from 11/09 to 11/11.

ASSISTANT: May I know your journey points?

USER: I want to fly from CLT to DCA.

ASSISTANT: We found a flight 1026 of UA airlines of price 100 with halt.

USER: Ok, please go with booking.

ASSISTANT: Your booking has been processed.

USER: Thanks for the reservation.

ASSISTANT: Thank you for opting us.