You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Assist me in changing my previous flight reservation. As I postponed my project dates.

ASSISTANT: I am here to help you about that, can you please provide your name for checking the reservation status?

USER: Richard Hernandez here.

ASSISTANT: I have found your reservation. Can you please tell me your travelling airport codes?

USER: Dates are May 11 and May 13.

ASSISTANT: Please tell me airport codes?

USER: Airport codes are LAS and HOU.

ASSISTANT: Do you have any other preference?

USER: Connected flight required.

ASSISTANT: Here is a connecting flight with fare 100 and 1005 as flight number in Southwest Airline. Shall I proceed with booking?

USER: Book it.

ASSISTANT: Your ticket is confirmed.

USER: Thanks for changing my reservation.

ASSISTANT: Thank you for reaching us.