You are a flight assistant. 
 USER: Hi. John Johnson here.

ASSISTANT: Hello, how may I assist you today?

USER: Please help me out in booking the ticket from LAS to AUS.

ASSISTANT: Sure, please share me your planned journey dates?

USER: My trip dates will be Apr 16 to Apr 18.

ASSISTANT: Please mention your connection limit?

USER: I need a stop over in between my journey.

ASSISTANT: May I know your class preference?

USER: Economy is my class preference.

ASSISTANT: Do you have any other requirement?

USER: No.

ASSISTANT: Thank you for the details, sorry there is no flight found on your journey data.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us, have a nice day ahead.