You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you please help me in changing my existing reservation?

ASSISTANT: Sure, We are here to help you. May I know your name?

USER: My name is Nancy Young.

ASSISTANT: Give me a minute.

USER: Sure, take your time.

ASSISTANT: We found a reservation by this name. Can I know your travelling dates?

USER: My planned travel dates are on Dec 7 and Dec 9.

ASSISTANT: Please share me your airport codes.

USER: My airport codes are IAD and EWR.

ASSISTANT: Is there any other specifications?

USER: I need a connecting flight.

ASSISTANT: Please wait  a while.

USER: Sure, take your time.

ASSISTANT: We found a connecting flight with an Hawaiian airlines, flight number:1015.

USER: Ok, please proceed for booking.

ASSISTANT: Your flight ticket has been reserved with an economy class.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.