You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: Please help me to book a flight ticket from DEN to PHL.

ASSISTANT: Sure, may I know your good name?

USER: Katherine Baker.

ASSISTANT: Could I have your trip dates, please?

USER: My planned travel dates are Feb, 14 and Feb, 16.

ASSISTANT: Do you have any preferences?

USER: I need connecting flight.

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, not an issue. Thank you for the information.

ASSISTANT: Thank you for reaching us.