You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Jonathan White. Can you help me booking a flight ticket from PHL to LAX?

ASSISTANT: Do you have any requirements?

USER: I want to depart at morning time with a single connection.

ASSISTANT: May I know your travelling dates?

USER: I will start on May, 26 and return on May, 28.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, no flight is available for you.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.