You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to attend a live concert in Las Vegas on Nov 6th. Could you please help me to book a flight ticket for me?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My starting dates I have already mentioned above and I'll return within two days that is on Nov 8th.

ASSISTANT: May I know your source and destination airport codes please?

USER: I would like to start my journey from EWR and my landing airport code is LAS.

ASSISTANT: Do you have any limits on number of connections?

USER: I want to fly with the connecting flight for this time.

ASSISTANT: May I know your name for the booking process?

USER: I am Shirley Clark.

ASSISTANT: Do you have any another specifications on your journey?

USER: No, please go with the above specifications.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: That's ok, I'll choose any alternative to reach my destination. Thank you for your information.

ASSISTANT: Welcome, thank you for reaching us.