You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I want to book a ticket from EWR to DCA, can you assist me in booking my ticket?

ASSISTANT: Certainly, I can do that for you. Will you please let me know your planned trip dates?

USER: My trip dates are Jan 18th and Jan 20th.

ASSISTANT: How many connections do you need?

USER: I need one connection between my trip.

ASSISTANT: Any other requirements to be met?

USER: No.

ASSISTANT: Please forward your name.

USER: Brian Perez.

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.