You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Assist me in booking a flight ticket from HOU to DEN.

ASSISTANT: Sure, I am here to help you with that. Can I know your planned trip dates?

USER: My travelling dates are in between Apr 27 and Apr 29.

ASSISTANT: Do you have any other requirements?

USER: Make sure that I need an connected flight.

ASSISTANT: May I know your name?

USER: I am Janet Baker.

ASSISTANT: Ok, wait for a minute.

USER: Sure.

ASSISTANT: Sorry to say that, there are no flights available based on your travelling dates.

USER: ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your response.