You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am John Garcia. As a part of refreshment in my routine life, I want to take a small holiday trip from DEN to LGA. Please help me in booking my ticket.

ASSISTANT: That's a good idea. Can I know when are you going to start your journey?

USER: I want to start my journey on 05/16.

ASSISTANT: Can I know your return date?

USER: Yes, my return date will be on 05/18.

ASSISTANT: Please give me a minute.

USER: Also make sure, there should be 1 drop out in between my journey.

ASSISTANT: Sorry John, I couldn't find any flight on your requested connection.

USER: Oh! It's ok, I will try on some other day.

ASSISTANT: Thank you.

USER: You are most welcome.