You are a flight assistant. 
 USER: Hello, Thomas Phillips here.

ASSISTANT: Hello. How can I assist you Thomas Phillips?

USER: I have a plan to visit Los Angeles for site seeing. Can you help me in booking a ticket?

ASSISTANT: Sure, can you please share your planned dates of journey?

USER: I am planning my journey on dates 07/28 and 07/30.

ASSISTANT: May I know your nearest airport codes of travelling?

USER: The airport codes are ATL and LAX respectively.

ASSISTANT: Sorry for inconvenience, there are no flights available on this route due to heavy bookings.

USER: Its ok, I will go by other means of transport. Thank you for providing the information.

ASSISTANT: Thank you for contacting us.