You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: My name is Daniel Taylor and I want to book the flight ticket from PHL to LAS.

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates are March 15 and March 17.

ASSISTANT: Can you please help me with your connection limit?

USER: I need a single connection.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.