You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Timothy Roberts need to book a ticket to LGA from DCA, can you please help me in booking?

ASSISTANT: Sure, please provide me your planned travel dates.

USER: My planned dates are from Aug 10 to Aug 12.

ASSISTANT: Do you have any specific departure and return time preference?

USER: I need to depart in the evening.

ASSISTANT: Sure, may I know which class do you prefer to travel?

USER: I am comfortable with any class.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: We have a flight from Hawaiian airlines, number 1020 with one connection and it is costing 200. Shall I proceed?

USER: If the depart time is in evening, you can proceed.

ASSISTANT: Your ticket has been booked in economy class. The depart time is 23:00 PM.

USER: Thank you.

ASSISTANT: Thank you for reaching us.