You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Michael Adams. Can you please help me in booking my flight ticket from HOU to DEN?

ASSISTANT: Sure, we are mirthful to help you. Can you please provide your travel dates?

USER: My trip dates are Dec 29 and Dec 31.

ASSISTANT: Do you have any requirements to be met?

USER: Please search for afternoon flight on return journey.

ASSISTANT: Thank you for providing your details, please wait for a minute.

USER: Ok.

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

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for contacting us.