You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to change my existing reservation due to sudden change in my family trip dates, Can  you help me out?

ASSISTANT: Sure, may I know your name?

USER: I am Cynthia Adams.

ASSISTANT: Ok, we found reservation on your name. Please help me with your travelling dates?

USER: My travelling dates are Mar 10 and Mar 12.

ASSISTANT: May I know your airport codes?

USER: My airport codes are MSP to LAS.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: American airlines flight- 1014 of price 100 with direct flight in economy class matches your given details, shall I proceed?

USER: Please proceed.

ASSISTANT: Ok, your flight ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.