You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am planning to change my reservation, due to heavy rainfall in Seattle, can you help me?

ASSISTANT: Sure, may I know your name?

USER: My name is Scott Carter.

ASSISTANT: We have found your reservation, can you share your trip dates?

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

ASSISTANT: May I know your journey airport codes?

USER: My departure airport is DCA and destination airport is IAD.

ASSISTANT: Do you have any preferences?

USER: I need a flight with connection limit 1 with economy class.

ASSISTANT: There is a direct flight with number 1017 in airline AA, the fare is 100 in economy class.

USER: Please proceed for booking.

ASSISTANT: Your ticket is reserved, the depart time is 1:00 AM and return time is 8:00 AM.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.