You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: Can you aid me to book a flight ticket from ATL to SFO?

ASSISTANT: Sure, please share me your trip dates.

USER: My trip dates are Oct 8 and Oct 10 respectively.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I prefer for connecting flight.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: Christine Miller here.

ASSISTANT: Would you let us know if you have any other preferences?

USER: I prefer for normal cost airlines.

ASSISTANT:  Sorry to say that, there are no flights available on the routes of your journey.

USER: Thank you.

ASSISTANT: Thank you for availing us.