You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me to book a flight ticket from IAD to PHX?

ASSISTANT: Sure, we are happy to help you. Can you please let me know your travelling dates?

USER: My travel dates are 29 to 31 of Jan.

ASSISTANT: Do you prefer any stopover in between journey?

USER: I want a connecting flight.

ASSISTANT: Are there any other specifications for you?

USER: I prefer to depart in the afternoon.

ASSISTANT: May I know your good name?

USER: I am Frank Martin.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.