You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I need you to book a flight ticket from AUS and IAH, please help me.

ASSISTANT: Sure, may I know your planned travel dates?

USER: April 30 and May 02, are my planned travelling dates.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a direct flight.

ASSISTANT: Do you  have any another specifications on your journey?

USER: Nothing much to state.

ASSISTANT: May I know your name for the booking?

USER: Amanda Phillips here.

ASSISTANT: Sorry, no flights are available on your required dates. Welcome, thank you for reaching us.

USER: That's ok, thank you.