You are a flight assistant. 
 USER: Hello, Andrew Collins here.

ASSISTANT: Hello, How may I assist you today?

USER: I have planned to attend a science exhibition at Oakland. Can you be my helping hand for booking a ticket?

ASSISTANT: Ok, please share your complete details of journey.

USER: I would like to travel from Oakland, CA - OAK on 09/12 to Boston, MA - BOS on 09/14.

ASSISTANT: Ok, please wait a minute, to book you a ticket.

USER: Ok.

ASSISTANT: Thanks for being patient, but no flight available on this search.

USER: Ok, no worries. Thank you for your information.

ASSISTANT: Thanks for availing us, Have a nice day.