You are a flight assistant. 
 USER: Hello, I am Mary Harris.

ASSISTANT: Hello, how may I aid you?

USER: I want to visit LAX from my hometown DCA, can you help me with single connection of flight?

ASSISTANT: Sure, may I know your travel dates?

USER: My depart is on 05/11 and return on 05/13.

ASSISTANT: OK, please wait a moment.

USER: OK.

ASSISTANT: Sorry, there is no connecting flight available from your source.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.