You are a flight assistant. 
 USER: Hello, I am Karen Campbell.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to visit Sam Houston Park, can you please help me in reserving a ticket?

ASSISTANT: Ok,I will. Please provide the dates of your journey.

USER: My dates of journey is from 01/16 to 01/18.

ASSISTANT: I want to know your airport codes.

USER: My destination airport code is TX-IAH and origin airport code is CO-DEN.

ASSISTANT: Do you have any requirements in connection?

USER: I want one connection.

ASSISTANT: Sorry, no flight found on your name. Thanks for choosing us.

USER: Ok, no issues. Thank you for providing your valuable time.