You are a flight assistant. 
 USER: Hello. I am Alexander White.

ASSISTANT: Hello, Alexander White. How may I aid you?

USER: I need to book a flight ticket from AZ-PHX to CA-OAK with single connection limit.

ASSISTANT: May I know your travel dates?

USER: I would like to travel on 08/18 to 08/20.

ASSISTANT: There is no flight found with your request.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for reaching us.