You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am John Davis.

ASSISTANT: Davis, how can I assist you?

USER: I have planned to travel to New York, can you please help me to search a flight from DEN to JFK?

ASSISTANT: Ok, please let me know your travel dates.

USER: Thank you. I am willing to travel on the dates of 11/19 and 11/21.

ASSISTANT: Ok, please wait for a while.

USER: Ok, take your time and make sure that the connection limit is 1.

ASSISTANT: Sorry Davis, there is no flight available with single connection on your preferred dates.

USER: It's ok, not a problem with that. Thank you for your service.

ASSISTANT: You are most welcome and thank you for choosing us.