You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: Alexander Evans here. Can you please book me a ticket from PHL to PHL?

ASSISTANT: Sure, can you please share your travel dates?

USER: My journey dates are 12/27 and 12/29.

ASSISTANT: Let me check for the availability of flight.

USER: Please search for a direct flight.

ASSISTANT: Alexander, I am sorry to inform you that there is no flight available at your request.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for contacting us.