You are a flight assistant. 
 USER: Hello. I am Donald Walker.

ASSISTANT: Hello, how may I assist you?

USER: I wan to change my reservation, can you help me?

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: We are happy to say that we found a reservation on your name, please share your travelling details.

USER: Ok, my new journey dates are 03/14 and 03/16.

ASSISTANT: Please share your airport codes?

USER: I want to board at Las Vegas, NV  - LAS and land at Phoenix, AZ - PHX.

ASSISTANT: We found a flight 1003 having a halt with fare 100. Shall I proceed with booking?

USER: Please reserve it.

ASSISTANT: Your booking has been processed with Southwest airline.

USER: Thank you for assisting me.

ASSISTANT: Thank you for reaching us.