You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I best serve you today?

USER: I want to book a ticket from ORD to PHL. Could you book a ticket?

ASSISTANT: Sure, can you please mention your depart and arrival dates of your journey?

USER: Travelling dates are from Oct, 16 to Oct, 18.

ASSISTANT: Do you like to go with a connecting or direct flight?

USER: I would prefer connecting flight.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: I would like to depart in the evening time and would like to return in the morning.

ASSISTANT: May I know your name please?

USER: My name is Catherine Nelson.

ASSISTANT: No flights found as per your preferences at the moment.

USER: Thanks.

ASSISTANT: Thank you for choosing us.