You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER:  I am Amanda Lopez want to travel to NY-JFK to attend a conference. Can you book a ticket from DC-DCA?

ASSISTANT: Sure, please share me your travelling dates?

USER: My travelling dates are 02/19 and 02/21.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights with your specifications.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your response.