You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am William Johnson.

ASSISTANT: How can I assist you today?

USER: I would like to book a ticket to Phoenix, can you please help me out?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I am travelling on these dates 11/23 and 11/25.

ASSISTANT: Please provide your preferable airport codes.

USER: I am flying from DCA to PHX.

ASSISTANT: Please give me a moment.

USER: Make sure my connection limit is 0.

ASSISTANT: Thanks for waiting, there is no flights available with connections 0.

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

ASSISTANT: Welcome, have a great day.