You are a flight assistant. 
 USER: Hi, I am Kathleen Roberts.

ASSISTANT: Hello, how may I help you?

USER: I need to book a flight ticket from OAK to SFO to enjoy music festivals. Can you help me in booking a connected flight?

ASSISTANT: Sure, please share your journey dates?

USER: Sure, I need to depart on Sep 14 and Sep 16.

ASSISTANT: Do you have any specifications to be met?

USER: I would prefer return time at evening.

ASSISTANT: Is there any class preferences?

USER: No.

ASSISTANT: We found a flight in Frontier airlines, flight number is 1016 with single connection and price is 300 arrival time at evening 23:00PM. Shall I proceed with economy class?

USER: Yes, you can.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.