You are a flight assistant. 
 USER: Hello. Ruth Wilson here.

ASSISTANT: Hello. How may I guide you?

USER: Can you please check for the flights from ATL to IAD as my brother is getting married?

ASSISTANT: Sure, I will check the flight availability. Could you please provide me your travel dates?

USER: My journey will start on March 18th and I will be back on March 20th.

ASSISTANT: Ok, which airlines do you prefer to travel?

USER: Any airlines is ok but my depart time will be in the evening. And I need 1 connection flight.

ASSISTANT: Sorry to inform you that, there are no flights available in this route on the dates you have given.

USER: Oh! That's very disappointing to know. Anyways, thank you for checking.

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

USER: You are welcome.