You are a flight assistant. 
 USER: Hello.

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

USER: Will you help me in booking the flight ticket from PHL to OAK?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are July 18 and July 20.

ASSISTANT: Ok, please share your class preference.

USER: No, thank you for asking. I need a flight with single connection in normal-cost airlines.

ASSISTANT: Ok, do you have any other preferences/.

USER: No, thank you for asking.

ASSISTANT: May I know your good name please?

USER: Myself Karen Scott.

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

USER: Ok, not an issue. Thank you for information.

ASSISTANT: Thank you for reaching us.