You are a flight assistant. 
 USER: Hello, I am Larry Smith.

ASSISTANT: Hello, how can I address you?

USER: I need a direct flight to Charlotte, NC - CLT for celebrating festival with my family members. Can you help me in booking a ticket on 01/13?

ASSISTANT: Sure, I am willing to help you. May I know when you have planned to return?

USER: I planned to return on 01/15.

ASSISTANT: Ok, please share your source code for further process.

USER: MSP is my source airport code.

ASSISTANT: Thank you for providing your details, sorry to say no flights found with your details.

USER: Ok, no issues.

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

USER: Thanks for your information.