You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am looking to do some modification in my existing reservation due to bad weather condition.

ASSISTANT: On which name ticket has been booked?

USER: Ticket has been booked on the name Amanda Hernandez.

ASSISTANT: May I know your new airport codes?

USER: My origin airport code is IAD and destination airport code is OAK.

ASSISTANT: When would you like to depart from IAD?

USER: My departure date is on 01/05.

ASSISTANT: Do you have plans for return journey? If yes, please provide me your return date.

USER: My return date is on 01/07.

ASSISTANT: Ok, wait a moment, I will search a best flight for you.

USER: Ok, take your time.

ASSISTANT: Happy to say you that, I found a flight-1017 with single connection and airline is Southwest. Shall I proceed?

USER: Please proceed.

ASSISTANT: Your booking process is completed.

USER: Thank you for booking, great service.

ASSISTANT: Thank you for approaching us.

USER: Welcome.