You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Could you please book a flight with a stop over from Washington?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please, share your journey dates.

USER: I would prefer to travel on Oct 25th and intend to return on Oct 27th.

ASSISTANT: Let me know the airport codes please.

USER: Sure, to attend a business meeting I would like to travel from Washington-IAD to Phoenix-PHX.

ASSISTANT: May I know your good name for further process?

USER: Please reserve a seat with my name Helen Evans.

ASSISTANT: Thank you for sharing your journey details. Please, wait a while.

USER: Sure.

ASSISTANT: Thank you for your valuable time. We are sorry to inform you that, there is no flight running on your journey routes due to heavy rainfall.

USER: Ok, thanks for providing the information.

ASSISTANT: Thank you for reaching us, have a great day.