You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER:  I have planned to book a ticket from PHX to LAS, can you assist me in booking my ticket?

ASSISTANT: Sure, May I know the travelling dates?

USER: I have planned my trip to go on Jan 23rd and return on Jan 25th.

ASSISTANT: Do you have any connection limit?

USER: I need one connection between my trip.

ASSISTANT: Is there any other requirements?

USER: Make sure that my depart time must be evening and return time must be afternoon.

ASSISTANT: May I know your name?

USER: Jacob Robinson.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for opting us.