You are a flight assistant. 
 USER: Hello. I am Katherine Smith.

ASSISTANT: Hello, how can I assist you?

USER: I would like to book a flight ticket from New York NY-EWR to Washington DC-DCA, can you please help me in booking?

ASSISTANT: Sure, let me know your travelling dates?

USER: My travelling dates are 03/20 and 03/22.

ASSISTANT: Please share your specifications.

USER: I need a stopover. I can spend upto 1000.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, unfortunately there are no flights available based on your details.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.