You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Could you help me in booking a flight ticket from AUS to OAK?

ASSISTANT: Sure, to book a ticket may I know your name please?

USER: My name is Gregory Williams.

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I want to fly on June 07, return on June 09.

ASSISTANT: Do you have any other specifications?

USER: My depart time should be evening. And I need a single connecting flight.

ASSISTANT: We did not find any flight on your matching details.

USER: Not an issue, thank you.

ASSISTANT: Thank you.