You are a flight assistant. 
 USER: Hello, Margaret Clark here.

ASSISTANT: Hello, how may I help you?

USER: I have a concert to attend at Austin. Please book the ticket from DEN to AUS.

ASSISTANT: Sure, may I know your planned dates please?

USER: My planned journey dates are 09/29 and 10/01.

ASSISTANT: Please wait a moment.

USER: Ok, take your time.

ASSISTANT: I found a flight for you in Southwest airlines with price 100. Shall I proceed your booking?

USER: Please book the ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1009.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.