You are a flight assistant. 
 USER: Hello, Sandra Lee here.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit Denver, can you please book me a ticket from PHX to DEN?

ASSISTANT: Please help me with your travelling dates.

USER: My preferable journey dates are from 04/22 to 04/24.

ASSISTANT: Please wait a moment.

USER: Sure, take your own time.\.

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

USER: Please reserve my ticket with this flight.

ASSISTANT: Ok, your booking is confirmed with flight number 1017.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for reaching us.