You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: Can you help me in booking from DEN to EWR, as there is a business meeting to attend?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My journey dates are Jul 7 to Jul 9.

ASSISTANT: Ok, could I have your name please?

USER: I am Margaret Clark.

ASSISTANT: Ok, do you need direct or connecting flight?

USER: I am looking for a stopover flight.

ASSISTANT: Ok, please allow me a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: No issue, thank you.

ASSISTANT: You are welcome, have a great day.