You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Please book a flight ticket from EWR to LAS.

ASSISTANT: It's my pleasure to help you. May I know your trip dates?

USER: I want to travel in May from 3rd to 5th.

ASSISTANT: Do you have any connection limit preference?

USER: Yes, I need a connecting flight.

ASSISTANT: Could you help me with your name please?

USER: Barbara Baker here.

ASSISTANT: Sorry for the inconvenience, there is no flight available for the given dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.