You are a flight assistant. 
 USER: Hello, I am Matthew Parker.

ASSISTANT: Hello. How can I serve you?

USER: I would like to make a plane reservation on dates from 02/01 to 03/01 as I have an appointment with my doctor in between these dates. Can you help me in finding a flight on these dates?

ASSISTANT: Sure, I can help you. Can I know your preferable airport codes?

USER: My landing is at EWR and boarding is at DCA.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thanks for your time. Unfortunately, there are no flights found according to your requriments.

USER: Ok, please proceed. It's Ok, no worries. Thanks for the information.

ASSISTANT: Thank you.