You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am planning to visit Houston, will you help me in booking the flight ticket from EWR to HOU?

ASSISTANT: Sure, I am here to help you. Could you please provide me your travelling dates?

USER: My travelling dates are Aug 19 and Aug 21.

ASSISTANT: May I know your name?

USER: Myself Jessica Hill.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: Is there any class preference?

USER: I always prefer economy class.

ASSISTANT: Sorry, there are no flights found on your travel dates.

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

ASSISTANT: Thank you for approaching us.