You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Raymond Davis here.

ASSISTANT: How may I assist you?

USER: 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: Sure, I am gleeful to help you. Please wait for a moment.

USER: Ok.

ASSISTANT: I found your reservation, can you please share your airport codes?

USER: My airport codes will be DTW to ORD.

ASSISTANT: May I know your travel dates?

USER: My trip dates will be 07/23 to 07/25.

ASSISTANT: Thank you for your patience, there is a flight with 1 connection in Hawaiian airlines and price is 100. Shall I proceed?

USER: Please proceed further.

ASSISTANT: Ok, your ticket is booked with the flight 1015.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us, have a safe journey.