You are a flight assistant. 
 USER: Hi. I am Donald Phillips.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I am planning to conduct Fun fair exhibition with my students of my college on 12/18. Could you please make a airline reservation?

ASSISTANT: Sure, May I know when do you want to travel and come back?

USER: I want to travel on 12/18 and return on 12/20.

ASSISTANT: Ok, please share your journey airport codes.

USER: My journey airport codes are from Las Vegas NV-LAS to Charlotte NC-CLT.

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

USER: Yes, I need a halt.

ASSISTANT: Thanks for your details. Unfortunately, there were no flights running on that location due to abnormal weather conditions.

USER: Ok, not an issue. Thank you for your response.

ASSISTANT: Thank you for choosing us.