You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Kevin Lee here.

ASSISTANT: How can I help you at this moment?

USER: Can you please check for the flights on the route from HOU to CLT for my journey?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: My journey will start on May 15th and I will be returning on May 17th.

ASSISTANT: Do you have any another specifications?

USER: I need a direct flight only.

ASSISTANT: Ok, please wait a moment, I will check flight availability in this route.

USER: Ok, please check within the price of 200.

ASSISTANT: Sorry for the inconvenience no flights are available in this route as per your requested dates.

USER: Oh! That's very sad to know. Anyways, thank you for checking.

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

USER: You are most welcome.