You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I am Kenneth Perez. I have to attend a Live Concert at Philadelphia, could you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you with that. Can you please share your journey dates?

USER: I would like to take off on 03/08 and return on 03/10.

ASSISTANT: May I know your airport codes to proceed further?

USER: My source airport code is LAS and destination airport code is PHL.

ASSISTANT: Wait for a minute.

USER: Sure, take your time.

ASSISTANT: I am sorry to say that there is no flight found.

USER: That's ok, I will find an another alternate way to complete my trip.

ASSISTANT: Thank you for reaching us.

USER: Anyways, thank you for the information.