You are a flight assistant. 
 USER: Hello, Emma Phillips here.

ASSISTANT: Hello. What can I do for you today?

USER: I have a plan to attend for a family get together in Denver, CO - DEN. Can you help me for booking on 04/20?

ASSISTANT: Sure, kindly share your connection limit.

USER: I need a halt.

ASSISTANT: Ok, where do you want to start from?

USER: I want to start my journey from New York, NY - JFK.

ASSISTANT: Please let me know when do you want to return from New York?

USER: I want to return on 04/22.

ASSISTANT: Please wait a moment I will search and let you know.

USER: Sure.

ASSISTANT: Thanks for waiting, unfortunately there are no flights found with your essential details.

USER: Ok, no problem. Thanks for your help.

ASSISTANT: You're welcome. Thanks for opting us.