You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I render you at this moment?

USER: I am Joseph Young. I would like to book a flight ticket from MSP to IAD. Could you please help?

ASSISTANT: Sure, please share your travelling dates?

USER: I am planning to start on 11/18 and return back on 11/20.

ASSISTANT: Please wait for few minutes.

USER: Yes, please take your time.

ASSISTANT: There is no flights found on your requested dates. Thank you for reaching us.

USER: Ok, no problem. Thank you for the information.