You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Stephen Hernandez here.

ASSISTANT: Nice to meet you Stephen.

USER: In the month of August, I want to travel from Oakland to Austin. Can you book my ticket?

ASSISTANT: Sure, let me know your airport codes please.

USER: Oakland's airport code is OAK and Austin's airport code is AUS.

ASSISTANT: Please share your travelling dates with me.

USER: My travelling dates are from 08/08 to 08/10.

ASSISTANT: Sorry Stephen, there is no flight available on your provided dates.

USER: It's ok. Anyway, thank you for searching.

ASSISTANT: Most welcome.