You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I need to book a flight ticket from MSP to IAD, can you help me in booking a flight ticket?

ASSISTANT: Sure, please share your journey dates?

USER: Sure, my scheduled dates are Jan 14 and Jan 16.

ASSISTANT: Do you have any specifications?

USER: I prefer maximum one connection. And return time at evening.

ASSISTANT: May I know your good name?

USER: Sure, Larry Allen here.

ASSISTANT: Sorry, no flights found on your given details.

USER: Ok, no issues.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your assistance.