You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I would like to visit Philadelphia to meet my best friend, can you help me to book a flight ticket from LAS to PHL?

ASSISTANT: Sure, could I have your trip dates, please?

USER: My travel dates are 02 to 04 of July.

ASSISTANT: Do you have any preferences?

USER: I need a direct flight.

ASSISTANT: On what name, do I need to reserve the ticket?

USER: I am Dorothy Rodriguez.

ASSISTANT: Sorry, no flights are available as per your requirements.

USER: Oh! that very sad to hear, thank you.

ASSISTANT: Thank you for opting us.