You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you today?

USER: I intend to fly from Los Angeles to attend a music concert at Washington. Can you help me book a connecting flight?

ASSISTANT: Sure, may I know your exact airport attributes?

USER: My airport codes are LAX and DCA.

ASSISTANT: Kindly mention your planned travelling dates to proceed further.

USER: My travelling dates are 10/25 and 10/27.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waitting, unfortunately there are no flights found with your essential dates. May I know your name please?

USER: My name is Margaret Evans.

ASSISTANT: Thank you for availing us.

USER: It's ok, thank you for the response.