You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Deborah Baker here.

ASSISTANT: How can I help you today? Yes Baker.

USER: I want to book a ticket to visit a place Bellagio Conservatory & Botanical Garden in Las Vegas. Will you help me with booking ticket from ORD to LAS?

ASSISTANT: Nice place to visit, may I know when you are going to start journey?

USER: I would like to travel on 08/27 and 08/29.

ASSISTANT: Sorry to say this, no flights as per your details.

USER: It's ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your service.

ASSISTANT: Have a pleasant day.