You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Please help to book a flight ticket from PHL to PHX.

ASSISTANT: May I know your desired travel dates please?

USER: My trip dates are from June, 01 to June, 03.

ASSISTANT: Do you have any specifications?

USER: I need a single connecting flight and I prefer normal-cost airline to fly.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: No problem, thanks for your information.

ASSISTANT: May I know your name please?

USER: My name is Amy Johnson.

ASSISTANT: Thank you for opting us.