You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: I am planning to visit New York, will you help me in booking the flight ticket from IAD to LGA?

ASSISTANT: Sure, May I know the travelling dates?

USER: My preferable journey dates are Aug 19 and Aug 21.

ASSISTANT: Do you have any connection limit?

USER: I need a flight with single connection.

ASSISTANT: Is there any other requirements?

USER: No, thank you for asking.

ASSISTANT: May I know your name?

USER: Myself Emily Clark.

ASSISTANT: Please wait a minute.

USER: Ok, I will wait.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for availing us.

USER: Thank you for choosing us.