You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I help you?

USER: I am Anna Jackson. Can you please make a flight ticket reservation in business class to attend a meeting in New York?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are, DFW to EWR.

ASSISTANT: When you are willing to travel?

USER: My journey dates are, May 15th and 17th.

ASSISTANT: Do you have any requirements?

USER: I need a connecting flight.

ASSISTANT: Sorry to inform you, there is no flight running on your route with your preferences.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for contacting us.