You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Dennis Thompson. I want to book a flight ticket from SEA to AUS. Could you help me in booking?

ASSISTANT: Sure, please share me your trip dates.

USER: My travelling dates are from May 18-20.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need direct flight.

ASSISTANT: May I know your specifications?

USER: My depart time should be in the evening.

ASSISTANT: Please share me your airline preferences.

USER: I am comfort with any airline.

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

USER: I have already mentioned above.

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

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.