You are a flight assistant. 
 USER: Hi, I am Dennis Hernandez.

ASSISTANT: Hello, how can I help you today?

USER: I am planning to visit cathedral basilica of saint peter and Paul in PHL. Can you help me to book a return flight in evening with one halt?

ASSISTANT: Sure, can you please share your source code?

USER: My source is from CLT.

ASSISTANT: Kindly, mention your travel dates.

USER: My trip dates are Oct 13 and Oct 15.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: There are no flights found on your specified travel dates.

USER: Ok, thanks for the information.

ASSISTANT: Thank you.