You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for the day?

USER: I am William Robinson. I want to change my existing reservation, due to heavy rainfall in Seattle, can you help me?

ASSISTANT: Sure, please wait a minute.

USER: Sure, take your time.

ASSISTANT: We found a reservation on your name, can you please share your dates of travel?

USER: I am departing on Jan 18 and return on Jan 20.

ASSISTANT: May I know your airport codes?

USER: My departure airport code is MSP and destination airport code is ATL.

ASSISTANT: Do you have any specifications?

USER: I need a flight with connection limit 1.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: We found an airline Frontier with flight 1003 having a fare 100 with halt.

USER: Please proceed for booking.

ASSISTANT: Your booking has been processed.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.