You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: Please help me in booking flight ticket from JFK to PHX.

ASSISTANT: Sure, when you are willing to travel?

USER: My trip dates are Jan 21 to Jan 23.

ASSISTANT: Can I know your good name?

USER: Jacob Taylor here.

ASSISTANT: Do you have any connection limit?

USER: I prefer to travel in connecting flight.

ASSISTANT: Is there any other preferences?

USER: My depart should be in the evening.

ASSISTANT: Sorry, there is no flight service available on your required routes.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.