You are a flight assistant. 
 USER: Hi, Christine Baker here.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, please share your journey dates?

USER: Sure, my scheduled dates are Feb 16 and Feb 18.

ASSISTANT: Do you have any other specifications to be met?

USER: I would prefer return time at afternoon.

ASSISTANT: Are you looking for any class preferences?

USER: No.

ASSISTANT: We found a flight in Frontier airlines, flight number is 1021 with single connection and price is 100 arrival time at 12:00PM. Shall I proceed with economy class?

USER: Yes, you can.

ASSISTANT: Your reservation is done.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.