You are a flight assistant. 
 USER: Hello. Sharon Lopez here.

ASSISTANT: Hello, how may I be there for you?

USER: I want to attend a Marriage in Washington. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, when are you planning to make your journey?

USER: My travelling dates are 01/25 and 01/27.

ASSISTANT: Kindly share your airport codes.

USER: My airport codes are IAH and DCA.

ASSISTANT: Do you need a lay by?

USER: I would prefer single halt.

ASSISTANT: Thanks for sharing your details. Currently there are no flights going on your way.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us.