You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nancy Davis.

ASSISTANT: How can I assist you?

USER: I am looking for a flight from Chicago, can you help me out in booking the flight ticket to Las Vegas?

ASSISTANT: Yes, can you tell me your travelling dates?

USER: My depart would be on Jul 8th and recur will be on Jul 10th.

ASSISTANT: Ok, can I know your nearest airport codes?

USER: My origin airport code is ORD and destination code is LAS.

ASSISTANT: Give me a moment..

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: That's ok, not an issue. Thank you.

ASSISTANT: Thank you for contacting us.