You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Samantha Hill. I need to change my recent existing reservation due to heavy rainfall. Could you please help me in doing that?

ASSISTANT: Sure, please wait for a moment. Thanks for waiting, we found a reservation with your name. Let me know your new travelling dates?

USER: My new travelling dates are 09/02 and return on 09/04.

ASSISTANT: May I know your source ad destination airport codes?

USER: My airport codes are IAH and OAK.

ASSISTANT: Thanks for providing your details, we found a connecting flight with fare of 200 in Delta airline. Shall I proceed for booking?

USER: You can proceed with booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for booking a ticket.

ASSISTANT: Thanks for opting us.