You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I want to fly from PHX to IAD. Can you book a ticket from that route?

ASSISTANT: Sure, I'm glad to help you. Can you please provide the dates on which you are planning to depart and arrive?

USER: Sure, my planned travel dates are 02/10 and 02/12.

ASSISTANT: Do you need break in between your journey?

USER: I want a flight with single connection.

ASSISTANT: Please let me know if you have any other specifications.

USER: Make sure that, my return time should be in the afternoon only.

ASSISTANT: Ok, may I know your good name please?

USER: Sure,Barbara White here.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for choosing us, have a nice day.