You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I am Richard King. I want to travel from LGA to CLT. Can you book a flight ticket for me?

ASSISTANT: Sure King, may I know your journey dates please?

USER: I want to travel in the flight on 09/23 and 09/25.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: King, there are no flights available at this moment.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for reaching us.