You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I would like to visit Nature festival at Houston with my best friends. Can you please book me a flight ticket from Philadelphia?

ASSISTANT: Sure, we are here to help you. Please provide your airport codes.

USER: My airport codes are from PHL to HOU.

ASSISTANT: When are you planning to travel?

USER: I am planning to travel on 04/25 and return on 04/27.

ASSISTANT: Do you want to connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Southwest airlines with single connection and price is 100 of 1010 flight. Shall I proceed to confirm?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for confirming my ticket.

ASSISTANT: May I know your name?

USER: George Lee is my name.

ASSISTANT: Thanks for choosing us.