You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Patricia Wright here. I want to attend a seminar on artificial intelligence, could you book my ticket from PHL to OAK?

ASSISTANT: Sure, can you please provide your journey dates?

USER: My itinerary dates are Sept 30 and Oct 2.

ASSISTANT: Do you prefer any way station in between journey?

USER: I need a connecting flight.

ASSISTANT: Can you please mention your class limit?

USER: I prefer economy class.

ASSISTANT: Is there any more requirements?

USER: I want to return in the evening.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry to inform you that, we did not find any flights matching your details.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.