You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you help me in booking a flight ticket from CLT to OAK?

ASSISTANT: Sure, may I know your travel dates?

USER: I want to travel on 01/25, and return on 01/27.

ASSISTANT: Please share me your name.

USER: I am Anna Allen.

ASSISTANT: Sorry, there is no flight at this moment.

USER: Ok, no issues.

ASSISTANT: Thank you.

USER: Thanks for the information.