You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What kind of help are you looking forward from our side?

USER: Can you please make a reservation from AUS to DEN to attend a marriage in Denver?

ASSISTANT: Sure, we will help with the best service.

USER: Thank you.

ASSISTANT: To go with the booking we need to know about your journey dates?

USER: My journey dates are on Apr 17th and 19th.

ASSISTANT: Do you want to fly in a connecting flight or in a direct flight?

USER: I need a connecting flight.

ASSISTANT: Is there any other concerns that you want to add in booking your flight ticket?

USER: I don't have any other concern.

ASSISTANT: On whose name the ticket should be reserved?

USER: My name is Raymond Hernandez.

ASSISTANT: Thank you for your details, unfortunately all flights are very busy with the given dates, so that we are unable to find a flight.

USER: Ok, no problem. Thank you.

ASSISTANT: Hope we serve you next time, thank you for availing with us.