You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Michelle Hernandez. There is a sudden plan in my trip, I want to change my existing reservation.

ASSISTANT: Ok. Can you tell me your new reservation details because I have found your previous reservation.

USER: Sure, my airport codes are from LAX to DEN. My trip dates are from 01/20 to 01/22.

ASSISTANT: Ok. I have found a flight for you with 1 connection. Shall I proceed?

USER: Sorry, I want the flight with 0 connection.

ASSISTANT: Ok. But in my records, I didn't found any direct flight.

USER: Ok, thank you for your help.

ASSISTANT: Thank you to visit here.