You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am Stephanie Clark want to visit Austin, can you book a ticket from IAH to AUS?

ASSISTANT: Sure, I am gleeful to help you out. Please share me your trip dates.

USER: Sure, my travelling dates will be 11/14 and 11/16.

ASSISTANT: Sorry Clark, there is no flight in your route with your dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.