You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Kevin Johnson.

ASSISTANT: How can I render you today?

USER: I am planning to celebrate the traditional festival with my parents in Charlotte NC-CLT, so please help me in booking a flight ticket.

ASSISTANT: Sure, we are mirthful to aid you.

USER: Thank you.

ASSISTANT: Let me know your arrival date.

USER: I would like to return on 02/24 from Charlotte.

ASSISTANT: May I know, from where would you prefer to take off?

USER: I would like to board from Chicago IL-ORD.

ASSISTANT: When you will start from Chicago to reach Charlotte?

USER: I will start from Chicago on 02/22.

ASSISTANT: Wait a minute, I will check the flights availability and let you know the details.

USER: Sure.

ASSISTANT: Thanks for your precious time. There are no flights found on your route.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.