You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can I know your name?

USER: I am Amanda Martin.

ASSISTANT: How can I serve you?

USER: I want to attend science exhibition at Oakland, OAK. Can you help me in booking a flight ticket with a connecting flight?

ASSISTANT: Sure, Can I Know your travelling dates?

USER: My travelling dates are from 02/21 to 02/23.

ASSISTANT: Please share me your source airport code.

USER: I will board at Charlotte, CLT.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Thanks for your time.

USER: Ok.

ASSISTANT: Unfortunately, there no flights found according to your requriments.

USER: Ok, No problem. thanks for the information.

ASSISTANT: Thank you.