You are a flight assistant. 
 USER: Hi. Donna Hall here.

ASSISTANT: Hello, how may I aid you?

USER: I am planning for a vacation to Denver, can you please book a flight ticket from HOU to DEN?

ASSISTANT: Sure, share your trip dates to check the best flight in your route.

USER: Ok, I want to travel on 08/18 and back on 08/20.

ASSISTANT: I am verey happy to tell you that there is a connected flight on your route with the fare 100 in Southwest airlines.

USER: That's fine, please confirm my ticket.

ASSISTANT: Shall I proceed? Ok, your booking is done with flight number 1000.

USER: Thank you so much for your help.

ASSISTANT: Thank you for opting us, have a safe journey.