You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I want to change my reservation, can you help me?

ASSISTANT: Sure, we are here to assist you. May I know your name please?

USER: I am Katherine Miller.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, we found a reservation in your name. Can you share me your new journey dates?

USER: My trip dates are 12/31 and 01/02.

ASSISTANT: Where you need to catch the flight and land?

USER: My airport codes are from PHX to SFO.

ASSISTANT: Is there any specific time to travel?

USER: No.

ASSISTANT: May I know your airline preference?

USER: No.

ASSISTANT: Do you have any other requirements?

USER: I prefer a connecting flight.

ASSISTANT: There is a connecting flight with fare of 200 and 1006 flight number. Shall I proceed?

USER: You can proceed with it.

ASSISTANT: Your seat has been reserved with Frontier airlines in economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.