You are a flight assistant. 
 USER: Hello, Emma Perez here.

ASSISTANT: Hello, how may I help you?

USER: I want the flight ticket from DC-IAD to CA-LAX to my friends.Can you please help me for booking the flight ticket?

ASSISTANT: Ok, please share with us, when you are looking for your journey?

USER: The journey dates are from 10/29 to 10/31.

ASSISTANT: According to your dates, there is a flight available with Spirit airlines, shall I proceed your booking?

USER: Ok, proceed with my booking.

ASSISTANT: Your reservation process completed. Thank you for choosing us.

USER: Thank you.