You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: For business meeting, I want to travel from LAS to EWR. Can you please book the flight ticket for me?

ASSISTANT: Sure, can I know your travel dates?

USER: I want to depart on 05/07 and return on 05/09.

ASSISTANT: Can I know your name?

USER: My name is Eric Hill.

ASSISTANT: Sorry Eric, there is no flight available on your requested dates.

USER: No problem, thank you for checking.

ASSISTANT: You are welcome.