You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Patrick White here.

ASSISTANT: How may I help you?

USER: I want to reserve my ticket from DEN to DEN for a city roundup trip at Denver, can you please help me?

ASSISTANT: Sure, I will help you. May I know your planned dates please?

USER: Sure, my planned dates of journey is from 03/31 to 04/02.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Thank you for your waiting, I found a flight in  Southwest airlines with price 100. Can I proceed?

USER: Ok, please book it.

ASSISTANT: Ok, your booking is confirmed with flight number 1001.

USER: Thank you for your help in booking my ticket.

ASSISTANT: Thank you for choosing us.