You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. How shall I assist you ?

USER: I am planning to visit Space Center in Houston, TX - HOU, will you help me in flight booking?

ASSISTANT: From which location would you like to depart.

USER: My origin source from PA - PHL, and my journey dates from 06/18 to 06/20.

ASSISTANT: Ticket is available with flight price 300, flight number 1026.

USER: May I know the connections limit?

ASSISTANT: Connection limit is 1.

USER: I want direct flight. Don't proceed to booking.

ASSISTANT: There is no direct flight.

USER: Thank you, for your service.

ASSISTANT: Thanks. May I know your name ?

USER: My name is Kathleen Johnson.

ASSISTANT: Thanks for being patient.