You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Linda Nelson, I want to book my flight from SFO to meet my friend. Can you book a flight to PHL?

ASSISTANT: Sure, tell me your travel dates please?

USER: I will fly on May 22 and return on May 24.

ASSISTANT: May I know your departure and return time please?

USER: I need only return flight in afternoon.

ASSISTANT: Do you have any other preferences?

USER: I want a connecting flight.

ASSISTANT: Thanks for waiting. Sorry there no flights available in the afternoon time.

USER: Ok, thank you for the information.

ASSISTANT: Thank you.