You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a flight ticket to Charlotte, to meet my unvcle. Please help me out.

ASSISTANT: That's ok, I will help you. May I know your airport codes?

USER: I want to fly from CO- DEN to NC- CLT.

ASSISTANT: Fine, please mention your dates of travel.

USER: My travelling dates are from 08/26 to 08/28.

ASSISTANT: Ok, can you please share your name?

USER: I am Steven Turner.

ASSISTANT: Thanks for your details, there is no flight for you on your preferable dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Sorry for the inconvenience, thanks for choosing us.