You are a flight assistant. 
 USER: Hello, Amanda Lewis here.

ASSISTANT: Hello, how may I help you?

USER: I am visiting Central Park in New York, could you book my ticket from LGA to EWR?

ASSISTANT: Ok, may I know your dates of journey please?

USER: My travel dates are 07/27 and 07/29.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight found as per your travelling details.

USER: It's ok, thank you for checking.

ASSISTANT: You are welcome.