You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I need to book a flight ticket from HOU to DCA to enjoy music festivals. Can you help me in booking a connected flight?

ASSISTANT: Sure, please share your journey dates?

USER: Sure, my journey dates are Dec 4 and Dec 6.

ASSISTANT: Do you have any specifications?

USER: I would prefer a economy class.

ASSISTANT: May I know your good name please?

USER: Sure, Kevin Lopez here.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: Ok, no issues. Thank you for your assistance.

ASSISTANT: Thank you for choosing us.