You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I am Pamela Walker. Me and my family are planning to visit to Denver Botanic Gardens at Denver.

ASSISTANT: Sure, May I know the journey codes?

USER: My airport codes are TX-AUS to CO-DEN.

ASSISTANT: Please help me with your travel dates.

USER: My trip dates are 04/27 and 04/29.

ASSISTANT: Sorry, No flights found with your chosen dates. Thank you for opting us.

USER: No issues. Thank for your kind service.