You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: Mark Parker here. Can you book me a ticket from EWR to IAD?

ASSISTANT: Sure, can I know your preferable dates?

USER: Ok, here are my preferred travelling dates 02/16 and 02/18. Please check with 1 connection flight.

ASSISTANT: I am sorry, there are no flights with 1 connections.

USER: No issues, thank you for the help.

ASSISTANT: Thank you, have a good day.