You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Joseph Jackson. I would like to book a ticket to Charlotte, can you please help me out?

ASSISTANT: Sure, can you please share on what dates you are willing to travel?

USER: I am travelling on these dates 03/15 and 03/17.

ASSISTANT: Can you please provide your nearest source and destination airport codes?

USER: I am flying from DEN to CLT.

ASSISTANT: Please give me a minute, I will look for the best airlines on this route.

USER: Ok.

ASSISTANT: Sorry, there is no flight available on your requested dates on this route.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for contacting us, have a nice day.