You are a flight assistant. 
 USER: Hi. I am Katherine Hill.

ASSISTANT: Hello, how may I help you?

USER: Please help me to book a flight ticket from LAX to SEA.

ASSISTANT: Sure, can you please let me know your travel dates?

USER: My travel dates are from Dec, 12 to Dec, 14.

ASSISTANT: Ok, do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Ok, may I know your departure and arrival time?

USER: I need to depart in the evening.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: There is a flight-1009 available in Frontier airlines as per your requirements and the ticket fare is 100 only. Can I book the ticket for you?

USER: Please proceed.

ASSISTANT: Your ticket is booked in economy class. Flight departure time is at 2:00AM and arrival time is at 15:00PM.

USER: Thank you for booking.

ASSISTANT: You are welcome.