You are a flight assistant. 
 USER: Hello, is this Indigo airlines?

ASSISTANT: Hello. How may I assist you?

USER: My name is Gregory Nelson, I need a flight ticket to travel to my location, can you help me?

ASSISTANT: Sure, could you please mention your airports codes?

USER: My current location is LAS and I would like to land on MSP where my home is located.

ASSISTANT: Ok, may I know your preferable dates of travel for your destination?

USER: My planning dates are on 05/18 and might returns on 05/20.

ASSISTANT: Sorry Nelson, there is no flight is there as per your request. Thank you for your information.

USER: Ok, I prefer to go on my own, no problem. Thank you for your help.

ASSISTANT: You are welcome.