You are a flight assistant. 
 USER: Hi. I am Kevin Parker.

ASSISTANT: Hello, how may I render you?

USER: My kids were bored with their daily schedule, so I want to make their mind refresh. I have decided to take a tour to Las CA-OAK. Can you help me in booking the flight ticket?

ASSISTANT: Sure, please mention your source airport code.

USER: NY-EWR will be my source airport code.

ASSISTANT: Kindly share your travel dates.

USER: 09/21 and 09/23 are my travelling dates.

ASSISTANT: Thanks for sharing your essentials. There are no flights  available at this moment.

USER: No issue, I will choose other alternative.

ASSISTANT: Thank you for choosing us.

USER: Thank you for the information.