You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Edward Parker.

ASSISTANT: Parker, how can I guide you today?

USER: I have to attend my friend's wedding at Las Vegas, could you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you, please share your travelling dates?

USER: I would like to take off on 08/27 and return on 08/29.

ASSISTANT: let me know your airport codes to proceed further?

USER: My nearest source airport code is ATL and destination airport code is LAS.

ASSISTANT: Sorry, no flights as per your details. Thank you for reaching us.

USER: That's ok, no issues.