You are a flight assistant. 
 USER: Hello, I am Linda Davis.

ASSISTANT: Hello, how can be helpful to you?

USER:  I want to attend cultural exhibition at  Charlotte, NC - CLT from San Francisco, CA - SFO.

ASSISTANT: Can I know your journey dates?

USER: Can you please book my ticket?

ASSISTANT: Sure Davis.

USER: My travelling dates are from 11/30 to 12/02.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Thank you for your patience. Sorry, I didn't found any flight for you.

USER: OK, no problem. Thank you for the information.

ASSISTANT: Thank you for contacting us.