You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you now?

USER: Can you help me to book a direct flight?

ASSISTANT: Sure, please share me your airport codes.

USER: My airport codes are EWR and ATL.

ASSISTANT: May I know your travelling dates, please?

USER: My travel dates are June 15 and June 17.

ASSISTANT: Do you have any class preference for your journey?

USER: Yes, I prefer economy class.

ASSISTANT: May I know about your other specifications, if any?

USER: No, thanks for asking.

ASSISTANT: Let me know your name to proceed further.

USER: I am Nancy Hernandez.

ASSISTANT: Sorry for the inconvenience, there are no flights running on your routes as per your specifications.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.