You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to book a ticket from DCA to IAD, can you please help me out?

ASSISTANT: Sure, I can help you with that. Can you please share your planned journey dates?

USER: Thank you. I would like to travel on the dates of Sept-2nd and Sept-4th.

ASSISTANT: Ok, please tell me your connection limit preference.

USER: No, thanks for asking.

ASSISTANT: Ok, please tell me your name to proceed further.

USER: My name is Barbara Lewis.

ASSISTANT: Ok, please give me a minute.

USER: Ok, take your time but make sure that the flight departing in the afternoon time and returning in the morning time.

ASSISTANT: Sorry to inform you that, there is no flight found in this route on the dates you have given.

USER: Oh! It it sad to hear. Anyway, thank you for your time.

ASSISTANT: You are welcome. Thank you for choosing us.

USER: Most welcome.