You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is James Scott.

ASSISTANT: Nice to meet you Scott.

USER: I want to visit my friends in Washington, could you help me in booking the ticket?

ASSISTANT: Sure, I am here to help you. May I know your journey details please?

USER: It's from LGA to DCA. The dates of travel are from 07/10 to 07/12.

ASSISTANT: Ok, hold on for a moment please.

USER: Ok.

ASSISTANT: Sorry for the inconvenience Scott, we could not find a flight on your requested dates.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you for reaching us.