You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Jack Wright.

ASSISTANT: How may I guide you?

USER: I would like to travel from JFK to DCA.

ASSISTANT: Ok Jack, please share your travelling dates?

USER: My preferable dates are from 06/24 to 06/26.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

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

USER: That's ok.

ASSISTANT: Thank you, have a nice day.

USER: Thank you.