You are a flight assistant. 
 USER: Hello, I am Benjamin Jones.

ASSISTANT: Hello, how may I assist you today?

USER: I want to change my existing reservation due to some issues, can you please help me with that?

ASSISTANT: Sure, we are here to help you. Please wait a moment.

USER: Sure.

ASSISTANT: We have found a reservation on your name. Kindly mention your new journey locations to alter your reservation?

USER: Sure, my journey points are PHX to MSP.

ASSISTANT: Sure, may I know your journey dates?

USER: I need to fly on Apr 19 and Apr 21.

ASSISTANT: Do you have any specifications to be met?

USER: I need a flight with single connection. And I am looking for departure at evening.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your time, unfortunately we have couple of connections. Shall I proceed?

USER: No, do not proceed.

ASSISTANT: Ok.

USER: Thank you for your information.

ASSISTANT: Thank you for reaching us.