You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Dorothy Hill.

ASSISTANT: Hill, how can I assist you today?

USER: I am planning to attend music concert at IAH, can you please help me with booking a flight ticket from LAS?

ASSISTANT: Sure, can you please tell me your trip dates?

USER: Sure, I would like to take off on 09/22 and return back on 09/24.

ASSISTANT: Sorry Hill, there are no flights available on your preferred dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for contacting us and have a nice day.

USER: You are welcome.