You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to visit New York for business meet, can you book a ticket please?

ASSISTANT: Sure, may I know your respective airports codes please?

USER: My airport codes are LGA and JFK.

ASSISTANT: Can you please provide your dates of journey?

USER: My travel dates are 07/19 and 07/21.

ASSISTANT: Sorry, to say that there is no flight as per your travelling details.

USER: Ok.

ASSISTANT: May I know your name please?

USER: My name is Edward Davis. Thank you  for checking.

ASSISTANT: Thank you, for contacting us.