You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I need to book a ticket from EWR to DCA. Could you book a ticket?

ASSISTANT: Sure, please provide your travelling dates.

USER: Travelling dates are Jan, 8 and Jan, 10.

ASSISTANT: Ok, Do you have any class preference?

USER: I would like to prefer business class.

ASSISTANT: Ok, please provide your connection limit.

USER: I would prefer direct flight.

ASSISTANT: Ok, Do you have any other preferences?

USER: I would like to depart in the afternoon time.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, There were no flights found with your given details.

USER: Thank you.

ASSISTANT: Ok, May I know your name?

USER: My name is Pamela Collins.

ASSISTANT: Thank you for reaching us.