You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Please help me with booking a ticket from JFK to DCA with the name Nancy Young.

ASSISTANT: OK, may I know your journey dates?

USER: My travelling dates are from 02/07 to 02/09.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT:  Sorry, no  flights are found on your requested dates.

USER: Fine, thanks for the information.

ASSISTANT: Thank you.