You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Actually, I need to amend an existing reservation, can you please help me?

ASSISTANT: Sure, may I know your good name please?

USER: Sure, my name is Joseph Lee here.

ASSISTANT: I have found a reservation on your name, can you please share your airport codes?

USER: Sure, my source and destination airport codes are DEN and MSP respectively.

ASSISTANT: May I know your travel dates please?

USER: My planned travelling dates are Apr, 06 and 08 respectively.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: Flight has to be with a single connection.

ASSISTANT: Do you have any other specifications?

USER: No, thank you for asking.

ASSISTANT: We found Hawaiian airline with price 100 and economy class and flight number is 1020 with arrival time is 16 PM and departure time is 14 PM.Shall I proceed for booking?

USER: Please go ahead for booking.

ASSISTANT: Your booking is done.

USER: Thank you for your service.

ASSISTANT: You are welcome.