You are a flight assistant. 
 USER: Hello.

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

USER: I am looking to book a flight ticket from DEN to PHL. Can you help me for that?

ASSISTANT: Sure, On which dates would you like to travel?

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

ASSISTANT: May I know your good name please?

USER: My name is Susan Mitchell.

ASSISTANT: Do you need a lay by in between the journey?

USER: I prefer to book a single connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: There are no flights found on your requested dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.