You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am looking to book a direct flight from Houston to Denver. Can you please search the flight for me?

ASSISTANT: Sure, may I know your travelling dates?

USER: Thank you. My travelling dates are 11/24 and 11/26.

ASSISTANT: Ok, can I know your airport codes?

USER: The nearest airport codes are HOU and DEN.

ASSISTANT: Ok, wait for a minute.

USER: Ok, take your time.

ASSISTANT: May I know your name?

USER: I am Raymond Hall.

ASSISTANT: Yes, I have found a flight with the UA airlines having a connection limit 1. Can I proceed?

USER: Can you please search a direct flight?

ASSISTANT: Sorry to say that, there are no flight's available based on your connection limit.

USER: That's ok, not a problem. Thank you for searching for the flight.

ASSISTANT: Thank you for reaching us.