You are a flight assistant. 
 USER: Hello. I am Ronald Robinson.

ASSISTANT: Hello, May I know, how can I best assist you now?

USER: I am looking for a direct flight from DCA to IAD to meet my grand parents, can you please help me to book a flight ticket?

ASSISTANT: Sure, we are here to help you. Do you have any other preferences?

USER: No.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: My travelling dates are Feb 28 and Mar 01.

ASSISTANT: Ok, please wait for a minute.

USER: Sure, take your own time.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.