You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I helpful to you?

USER:  As I am a scientist, I want to attend science festival with my students at New York, JFK.

ASSISTANT: Ok.

USER: Can you help me to book a ticket from Charlotte, CLT?

ASSISTANT: Sure, let me know your travelling dates?

USER: Dates are 05/27 and 05/29.

ASSISTANT: Do you have any other preferences to be met?

USER: I need break in my journey. Price should not cross 200.

ASSISTANT: Ok, may I know your name please?

USER: Debra Martinez here.

ASSISTANT: Sorry, no flights were running to your particular locations.

USER: No problem, I will check with another airline.

ASSISTANT: Thanks for opting us.

USER: Thank you for availing us.