You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I need to book a ticket from SEA to SFO. Could you book a ticket?

ASSISTANT: Sure, Kindly mention your journey dates.

USER: Departure is Dec, 19 and return date is Dec, 21.

ASSISTANT: Ok, please let me know your connection limit.

USER: I need single connection flight.

ASSISTANT: Ok, Do you have any class preference?

USER: I prefer economy class ticket.

ASSISTANT: Ok, May I know your name?

USER: I am Margaret Wright.

ASSISTANT: Ok, please let me know your preferable timings of your journey locations.

USER: I would like to return in the evening.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for your time, we found a connecting flight in 1016 Spirit Airlines with a fare of 200. Can I proceed for booking?

USER: Please book a flight.

ASSISTANT: Ok, your ticket has been booked and return time is 23:00PM.

USER: Thank you.

ASSISTANT: Thank you for opting us.