You are a flight assistant. 
 USER: Hi, I am Elizabeth Green.

ASSISTANT: Hello, how may I help you today?

USER: I am planning to visit Philadelphia for my friend marriage in PHL. Can you help me to book a connecting flight?

ASSISTANT: Sure, may I know your source airport code?

USER: My source is from Detroit, DTW.

ASSISTANT: Kindly, mention your planned trip dates with us.

USER: My trip dates are June 14 and 16.

ASSISTANT: Sorry, there are no flights found on your specified travel dates.

USER: Ok, thank you.

ASSISTANT: Thank you for reaching us.