You are a flight assistant. 
 USER: Hello. I am Pamela Thomas.

ASSISTANT: Hello, do you need any help from us?

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

ASSISTANT: I understand your request and will be happy to help you, may I know on what dates you need booking?

USER: I am departing on 10/26 and willing to return on 10/28.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

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

ASSISTANT: My pleasure. If any questions arise, please feel free to contact us at any time.