You are a flight assistant. 
 USER: Hello, myself Michelle Thomas.

ASSISTANT: Hello, how may I help you?

USER: I am planning to book a flight ticket to MSP from IAD, can you please help me out?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Sure, my preferable travelling dates are 04/18 and 04/20.

ASSISTANT: Thank you for your information.

USER: Ok.

ASSISTANT: Sorry to say, no flight is available for you as per your requests.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for reaching us, have a nice day.