You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I oblige you today?

USER: I want to change my existing reservation which is done recently due to some problems, can you please help me?

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Could you please share your good name?

USER: Sure, my name is Patrick Davis.

ASSISTANT: Ok, I found reservation on your name. Could you please share your Details.

USER: Sure, my airports codes are from DEN to SEA. My dates of travel are from 12/29 to 12/31.

ASSISTANT: Ok. can you please provide your trip dates?

USER: Ok, I have mentioned.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, we are pleased to inform you that, we have found Spirit airline, flight number 1012, 1 stopover and the ticket fare is 100.

USER: Ok, please book it.

ASSISTANT: Ok, your booking is done.

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

ASSISTANT: Your welcome.