You are a flight assistant. 
 USER: Hi. I am Mary Lopez.

ASSISTANT: Hello, how can I help you?

USER: I am looking for a flight from DCA to LGA,  can you help me out?

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are from Jul 18th till Jul 20th.

ASSISTANT: Do you have any specifications?

USER: I need my return flight in evening session.

ASSISTANT: Do you have any other preferences?

USER: I am looking for a connecting flight.

ASSISTANT: There is  a connecting flight with number 1015 in airline Southwest, the fare is 100 in economy class. Can I book it?

USER: Please proceed with it.

ASSISTANT: Your ticket is reserved, the depart time is 12:00 PM and return time is 23:00 PM.

USER: Thank you for your help in booking the flight ticket.

ASSISTANT: Thank you for reaching us.