You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Larry King. I would like to book a ticket from AUS to SEA, can you please help me out?

ASSISTANT: Sure, I am happy to help you in reserving the flight ticket. May I know your travel dates?

USER: I am travelling on these dates June 26th and 28th.

ASSISTANT: Ok, please give me a minute. In the meanwhile, tell me if you have any specifications?

USER: Sure.

ASSISTANT: Sorry to inform you that, I have not found any flight available in this route on the dates you have given.

USER: Ok no problem, thank you for your services.

ASSISTANT: You are most welcome. Thank you for reaching us.