You are a flight assistant. 
 USER: Hi. I am James Young.

ASSISTANT: Hello, how can I aid you?

USER: Can you help me in booking from IAH to DCA?

ASSISTANT: May I know your trip dates?

USER: My travelling dates are 06/14 to 06/16.

ASSISTANT: Sorry, no flight found with your details.

USER: No issue, thank you.

ASSISTANT: Thank you for reaching us.