You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you?

USER: I am Richard Taylor. Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation. Can you help me with it please?

ASSISTANT: Sure, let me check the list and revert you.

USER: Ok.

ASSISTANT: We found a reservation on your name. Please provide your updated travel dates.

USER: I have planned to travel on 09/18 and return on 09/20.

ASSISTANT: Please also mention your airport codes.

USER: My airport codes are MI-DTW and CA-OAK.

ASSISTANT: Southwest airline with flight number 1008 and fare of 100 available on you rdates.

USER: Please proceed with booking.

ASSISTANT: Your booking has been done.

USER: Thank you for the help.

ASSISTANT: Thank you for opting us.