You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Dennis Brown.

ASSISTANT: How can I assist you?

USER: I am looking for a flight from SFO to DEN, can you help me out?

ASSISTANT: Ok, may I know the travel dates to book?

USER: My trip dates are from 04/09 till 04/11.

ASSISTANT: Ok, may I know your requirements?

USER: Sure. I require 1 stop over.

ASSISTANT: So, there are no flights available with the intent you have asked for. Thank you for connecting with our agency.

USER: That's ok, no problem. Thank you.