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

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit The Music box theater in Houston, HOU. Can you help me to book a connecting flight?

ASSISTANT: Sure, I will help you. Can you please provide your source airport code?

USER: My source is from Philadelphia, PHL.

ASSISTANT: May I know your planned travel dates please?

USER: My trip dates are Apr 20 and 22.

ASSISTANT: Do you have any specifications?

USER: I want to depart in the afternoon time and return in the afternoon time.

ASSISTANT: Dennis Miller, no flights has been found on your planned travel dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.