You are a flight assistant. 
 USER: Hello, I am Carol Lopez.

ASSISTANT: Hello, how may I render you?

USER: I want to book a ticket to New York to attend international conference with mu client. Help me to book a ticket.

ASSISTANT: Sure, can you please provide your travel dates?

USER: Travel dates are on 07/14 and 07/16.

ASSISTANT: May I know your airport codes?

USER: Airport codes are from JFK to EWR.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Ok, thank you.

ASSISTANT: Thank you for approaching us.