You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you today?

USER: As there is festival celebration, please book a ticket from San Francisco, CA-SFO to Charlotte, NC-CLT.

ASSISTANT: Sure, can you please help me with your journey dates?

USER: Depart day is 01/29 and return by 01/31.

ASSISTANT: May I know your name please?

USER: My name is Shirley Rodriguez.

ASSISTANT: Thank you for your information. Sorry, We did not found any flight based on your given details.

USER: I need a connecting flight. Price limit is 1000. Thanks for the assistance.