You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mary Clark here.

ASSISTANT: How can I help you?

USER: I want to book a flight on the route from DEN to JFK, can you help me out?

ASSISTANT: Can you please tell your travelling dates?

USER: I was planning to travel on the dates from 04/29, and I will be returning on 05/01.

ASSISTANT: Do you have any connection limit?

USER: 1 connection is mostly preferable for my flight.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: Oh! No issues with it, thank you for checking.

ASSISTANT: Thank you and have a nice day.

USER: Most welcome.