You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Will you help me in booking the flight ticket from ORD to IAD?

ASSISTANT: Sure, I will help you with booking. Please mention your planned journey dates?

USER: My travelling dates are Feb 25 and Feb 27.

ASSISTANT: Please share me your connection limit?

USER: I need a flight with single connection.

ASSISTANT: Do you have any other preferences?

USER: No, thank you for asking.

ASSISTANT: May I know your good name?

USER: Myself Alexander Mitchell.

ASSISTANT: Thank you for your name, sorry there is no flight available on your given journey data.

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

ASSISTANT: Thank you for visiting us, we hope see you again.