You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

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

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: My trip dates are from Jun 28th till Jun 30th.

ASSISTANT: Ok, do you have any connection limit?

USER: I just need a direct flight in my journey that's it.

ASSISTANT: Ok, may I know your name?

USER: Myself Joshua Campbell.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, not an issue. Thank you for your help.

ASSISTANT: Welcome.