You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Nicholas Lopez here. I want to reserve my ticket from HOU to DCA, can you please help me out?

ASSISTANT: Sure, may I know your planned trip dates?

USER: Sure, my planned travelling dates of journey are from Aug, 11 to Aug, 13.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your arrival and depart timings?

USER: Yes, I need a return time at afternoon.

ASSISTANT: Do you have any more specifications?

USER: No.

ASSISTANT: Sorry, there are no flights found on your specified routes.

USER: Ok, not an issue. Thank you for your service.

ASSISTANT: Thank you for availing us.