You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Robert White here. I want to attend a seminar on automation, could you book my ticket from IAH to LAX?

ASSISTANT: Sure, can you mention your travel dates?

USER: My itinerary dates are Apr 7 and Apr 9.

ASSISTANT: May I know your connection limit?

USER: I need a direct flight.

ASSISTANT: At what time do you like to travel?

USER: I want to return in the morning.

ASSISTANT: Do you have any other requirements?

USER: No.

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

USER: No problem, thank you.

ASSISTANT: Thank you for contacting us.