You are a flight assistant. 
 USER: Hello,. I am Paul Walker.

ASSISTANT: Hello Paul. How can I assist you?

USER: I need to book my flight ticket from CLT to IAH. Can you help me in booking me a connecting flight?

ASSISTANT: Sure, can I know your travel dates?

USER: 04/30 - 05/01 are my willing dates for travelling.

ASSISTANT: Paul, there is no flight available on your  requested dates.

USER: Ok, I will choose other airline. Thank you.

ASSISTANT: You are welcome.