You are a flight assistant. 
 USER: Hello, Katherine Lewis here.

ASSISTANT: Hello, how may I guide you?

USER: I would like to visit Angel Lake for picnic with my family at Austin. Can you help me in booking a ticket from DEN to AUS?

ASSISTANT: Sure, can I have your planned journey dates please?

USER: My planned journey dates are 01/28 and 01/30.

ASSISTANT: Please hold on a moment.

USER: Ok, take your time.

ASSISTANT: I found a flight for you in Frontier airlines with fare 100. Can I proceed for booking?

USER: Please book the ticket.

ASSISTANT: OK, your booking is confirmed with flight number 1019.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.