You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you out?

USER: I am Joseph Allen. I would like to book a ticket from PHX to IAH, can you please help me out?

ASSISTANT: Sure, I am happy to help you. Please let me know your travelling dates.

USER: I am travelling on these dates Aug 23rd and 25th.

ASSISTANT: Is there any connection limit for you?

USER: I need a connection limit 1.

ASSISTANT: Do you have any class preference?

USER: I prefer business class.

ASSISTANT: May I know your specific depart and arrival time please?

USER: I prefer departure time in afternoon.

ASSISTANT: Is there any other specifications for you?

USER: I don't have any other preferences.

ASSISTANT: Thanks for providing details, no flights are available on your journey routes.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for choosing us.