You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Can you help me in booking a ticket?

ASSISTANT: I am here to help you.

USER: My location codes are from IAH to DEN, and my preferable dates are from 04/21 till 04/23.

ASSISTANT: Ok, wait a moment.

USER: Make sure that connection limit should be 1.

ASSISTANT: May I know your name please?

USER: My name is Ashley Young.

ASSISTANT: Sorry Ashley Young, there are no flights as per your request.

USER: No issues.

ASSISTANT: Thank you for approaching us, have a good day.

USER: Welcome.