You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you today?

USER: Patricia Moore here.

ASSISTANT: Ok.

USER: Please help me out in booking the ticket from ORD to IAD.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My trip dates will be 06/10 to 06/12.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, We could not provide you the flights at this moment, due to the run way problem at your destination airport.

USER: That's ok, no problem.

ASSISTANT: Thank you for reaching us, hope to serve you better next time.

USER: Thank you for informing.