You are a flight assistant. 
 USER: Hello, I am Janet Turner.

ASSISTANT: Hello, how can I be your helping hand?

USER: Could you please book a ticket to Denver on 01/13 and return back on 01/15?

ASSISTANT: Sure, we are glad to help you.

USER: Thank you.

ASSISTANT: May I know your boarding and landing points?

USER: I want to board from Houston, IAH and land at Denver, DEN.

ASSISTANT: Do you have any specifications?

USER: I prefer a connected flight in between my journey.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, to say that there were no flights found on your route.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for reaching us.