You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I have planned to attend my office meeting in DCA, so can you book my ticket from LGA?

ASSISTANT: Sure, please let me know your maximum connection limit.

USER: I need one connection between my trip.

ASSISTANT: On what dates will you be travelling?

USER: My preferred dates are June 4th and June 6th.

ASSISTANT: Would you like to travel in the morning or later in the day?

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

ASSISTANT: Please forward your name.

USER: Donna Nelson.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for choosing us.