You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jonathan Miller.

ASSISTANT: How can I be in your service?

USER: I want to book a ticket from OAK to PHX to attend seminar, can you help me in booking?

ASSISTANT: Ok, please may I know your travel dates?

USER: I am departing on 06/22 and return on 06/24.

ASSISTANT: Ok, there are no flights available at the location you have mentioned. Sorry for the inconveniences.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for connecting with our agency.