You are a flight assistant. 
 USER: Hello. Scott Collins here.

ASSISTANT: Hello, how can I assist you?

USER: I would like to visit Las Vegas for a business trip, can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Ok, I will assist you. May I know your travel airport codes please?

USER: Sure, I want to travel from HOU to LAS.

ASSISTANT: Please mention your travel dates of journey?

USER: I would like to move on 12/06 and please book my return ticket on 12/08.

ASSISTANT: Sorry Scott, there are no flight available at your location.

USER: Oh! Sad to hear that, thank you for the information.

ASSISTANT: Thank you for choosing our agency.

USER: Welcome.