You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to book a flight ticket from BOS to AUS to meet my friends.

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are Apr 26 and Apr 28.

ASSISTANT: Please share me your name.

USER: I am Eric Rodriguez.

ASSISTANT: Sorry, there is no flight at this moment.

USER: No worries, thank you for the information.

ASSISTANT: Thank you.