You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: I am Jacob Thompson. I want to celebrate my birthday with my parents, so will you help me to book a flight ticket from Austin, IL - ORD?

ASSISTANT: Sure, we are happy to help you.

USER: Thanks.

ASSISTANT: May I know your source point?

USER: I already mentioned.

ASSISTANT: Ok, please provide me your destination point.

USER: My destination airport is Austin, TX - AUS.

ASSISTANT: Kindly assign your preferred dates of travelling?

USER: My travel dates are 10/15 and 10/17.

ASSISTANT: Do you require any stopovers in your journey?

USER: Yes, I need a halt.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no flight available on your dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing our service.