You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help are you looking for?

USER: I am Paul Hernandez. I am planning to attend a music event in Las Vegas.Can you please help me out to book a ticket?

ASSISTANT: Sure, I will help you in booking your flight reservation . Could you please let me know your nearest source and destination airport codes?

USER: My nearest source airport codes is NC-CLT and destination code is NV-LAS.

ASSISTANT: Ok. Could I know your travel date please?

USER: I would like to travel on 06/02 and return on 06/04.

ASSISTANT: Ok, please give me a moment to search for available flights.

USER: Sure, take your own time.

ASSISTANT: Thank you for your patience. Sorry Paul, there are no flights available that fits your schedule.

USER: That's fine, thank you for your help.

ASSISTANT: You are welcome. Thank you for reaching us.