You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Charles Robinson.

ASSISTANT: How may I help you?

USER: I am planning to attend music concert at LAX, can you please help me with booking a flight ticket from IAD?

ASSISTANT: Sure, could you please share your travelling dates to search a flight?

USER: Sure, I would like to take off on 05/13 and return back on 05/15.

ASSISTANT: Please wait for a moment.

USER: Please make sure that the connection limit is 0.

ASSISTANT: Sorry, no flight is available for you.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Welcome.