You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I would like to visit Philadelphia to enjoy myself, can you please help me to book a flight ticket from LAX to PHL?

ASSISTANT: Sure, please provide your itinerary dates.

USER: I have planned to travel on 01/13th and return  on 01/15th.

ASSISTANT: Do you have any specifications?

USER: Yes, I prefer direct flight.

ASSISTANT: Do you have any other preferences?

USER: I don't have any specifications.

ASSISTANT: Direct flight is provided by AA airlines and ticket costs you 100 in economy class.

USER: Yes, please book this ticket.

ASSISTANT: May I know your name?

USER: Myself Steven Martin.

ASSISTANT: Your ticket is confirmed Steven Martin. Flight departs at 21:00 PM and arrives at 5:00 AM.

USER: Thank you.

ASSISTANT: Thank you for reaching us.