You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight from Austin to visit my grand father's house. Can you book me a flight on Apr 22?

ASSISTANT: Sure, please provide your journey airport codes.

USER: My source point is AUS and destination point is ORD.

ASSISTANT: Ok, when do you want to return?

USER: I will return on Apr 24.

ASSISTANT: Ok, Do you have any class preference?

USER: No.

ASSISTANT: Ok, please let me know your connection limit.

USER: I prefer a connecting flight.

ASSISTANT: Ok, Is there any other preferences?

USER: No.

ASSISTANT: Thank you for providing details, we found a connecting flight in 1001 Frontier Airlines with a fare of 300. Can I proceed for booking?

USER: Please proceed with booking.

ASSISTANT: May I know your name?

USER: My name is Mary Thomas.

ASSISTANT: Your ticket has been booked.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.