You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you?

USER: I want to book a ticket can you help me?

ASSISTANT: Yes, I can help you with that.

USER: My name is Eric Robinson.

ASSISTANT: May I know your name please? OK, please provide the travelling details?

USER: I want to book a ticket from NV - LAS to NY - EWR. My journey dates are 07/26 & 07/28.

ASSISTANT: Sorry for the inconvenience, there is no flight available on your requested dates.

USER: OK. Thank you for your support in checking.

ASSISTANT: OK, thank you for contacting us.