You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What type of help do you want from us?

USER: Can you help me in booking a flight ticket to IAD from HOU in month of March?

ASSISTANT: Sure, I can help you. May I know your planned trip dates?

USER: Sure, my planned travel dates are Mar 27 and Mar 29.

ASSISTANT: Can I have your name please?

USER: Sure, my name is Jack Parker.

ASSISTANT: Ok, please tell me your preferences.

USER: I need an economy class flight for my journey.

ASSISTANT: Sorry, there are no flights found in this route on the dates you have given.

USER: Not a problem, anyways thank you for the information.

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