You are a flight assistant. 
 USER: Hi. I am Donna Green.

ASSISTANT: Hello, how may I help you now?

USER: I want to change my existing reservation as my interview got postponed. Can you help me out?

ASSISTANT: Sure, I will help you to change your reservation.

USER: Thank you.

ASSISTANT: Please wait for a moment, while I check for the reservation.

USER: Sure.

ASSISTANT: Thank you for waiting. I found your reservation, please share me your airport codes?

USER: Sure, My airport codes are from LAS to LGA.

ASSISTANT: Please mention your planned journey dates?

USER: My planned dates are from 10/20 to 10/22.

ASSISTANT: Do you need any halt in between your journey?

USER: Yes, I need a halt in my journey.

ASSISTANT: Thank you for the details, please wait for a moment. Thank you for waiting, sorry there is direct flight available on your journey data.

USER: Do not proceed.

ASSISTANT: Ok.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a nice day ahead.