You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I am Sarah Williams. I would like to visit LAS to attend my friend marriage, can you please help me to book a flight from EWR?

ASSISTANT: Sure, can you share your trip dates?

USER: Sure, my travel dates are 11 May and 13 May.

ASSISTANT: Do you have any specifications?

USER: Yes, I am looking for a single connection flight.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: It's ok, no more issues. Thank you for your information.

ASSISTANT: Thank you for opting us.