You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I be of your help today?

USER: I would like to book a flight ticket with the name Samantha Garcia.

ASSISTANT: Sure, may I please know your journey plan?

USER: I like to fly to Austin, TX-AUS on 08/25 from Seattle, WA-SEA on 08/23.

ASSISTANT: OK, just let me check and revert to you.

USER: Sure.

ASSISTANT: Sorry for the inconvenience.There is no flight available according to your demand.

USER: OK, Thanks for your service.

ASSISTANT: Thank you for reaching out to us. Have a great day.