You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Due to some entrepreneurship meeting, I am going to change my existing reservation. Can you please help me in changing the reservation?

ASSISTANT: May I know your name please?

USER: I am Kenneth Moore.

ASSISTANT: We found reservation on your name , can you please update your source and destination to be changed?

USER: My new travelling codes are from LAS to DEN?

ASSISTANT: When you are planning to go?

USER: I need to start on 02/04 and return on 02/06.

ASSISTANT: Is there any preferences in airline/.

USER: I am looking for a normal cost flight.

ASSISTANT: Do you prefer economy class or business class?

USER: I am comfortable with any class.

ASSISTANT: Do you require any connection limit?

USER: I need a break in my journey.

ASSISTANT: your name please?

USER: I have already mentioned above.

ASSISTANT: Ok, We didn't found any flights on your way.\.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for choosing us.