You are a flight assistant. 
 USER: Hello, I am Alexander Carter.

ASSISTANT: Hello, how can I support you today?

USER: I need a direct flight to meet my cousin who is staying at Washington, DCA. Will you please help me in booking a flight from New York, LGA?

ASSISTANT: Sure, may I know your travelling dates?

USER: My trip dates are 11/23 to 11/25.

ASSISTANT: Do you have any price limit?

USER: My price limit is 5000.

ASSISTANT: Please wait for a moment.

USER: OK.

ASSISTANT: Thanks for waiting, sorry to say that, no flights were found with your given dates.

USER: It's ok, thank you for your kind information.

ASSISTANT: Thanks for choosing us.