You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to travel from PHX to CLT. Can you help me to book a flight ticket?

ASSISTANT: May I know your desired travel dates please?

USER: I would like to fly in the flight on Jan 04 and Jan 06.

ASSISTANT: Do you have any specifications?

USER: I am looking for a direct flight.

ASSISTANT: May I know your name please?

USER: I am Amy Robinson.

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

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

ASSISTANT: Thank you for opting us.