You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Karen Lee. I am planning to travel from HOU to SEA, can you help in booking  a flight?

ASSISTANT: Definitely, I will help you with that booking. Please share your travelling dates.

USER: My travelling dates are 05/10 to 05/12.

ASSISTANT: Just give a moment.

USER: Ok.

ASSISTANT: Sorry, there is no flight available on your desired route.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.