You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Matthew Hernandez. I would like to visit Austin to meet my friend, can you please help me to book a flight ticket from DCA to AUS?

ASSISTANT: Sure, can you share your trip dates?

USER: Sure, my travel dates are Apr 16 and Apr 18.

ASSISTANT: Do you have any preferences?

USER: My class preference is business class.

ASSISTANT: Give me a minute.

USER: Sure, take your own time.

ASSISTANT: There is a connecting flight with number 1013 in airline Frontier, the fare is 400 in business class. Can I book it?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.