You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you please help me in booking a flight ticket from DFW to AUS?

ASSISTANT: Sure, I am here to help you. Can you please share your travel dates?

USER: I want to fly on Mar 31 and return on Apr 02.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection.

ASSISTANT: May I know your class preference?

USER: I would like to prefer economy class.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Please share your name to proceed further.

USER: My name is Charles Parker.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.