You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please reserve me a flight ticket from EWR to DEN?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My preferable journey dates are July 28 and July 30.

ASSISTANT: Let me know your connection limit.

USER: I prefer direct flight for this trip.

ASSISTANT: Do you have any specification?

USER: No, thanks for asking.

ASSISTANT: Can you please tell me your name?

USER: My name is Sandra Adams.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for reaching us, have a nice day.