You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Susan Roberts.

ASSISTANT: How can I assist you?

USER: Can you please reserve me a direct flight from IAD to PHX?

ASSISTANT: Sure, can I know the travel dates please?

USER: My trip dates are 11/22 - 11/24.

ASSISTANT: Do you have any requirements?

USER: My depart time should be in the afternoon.

ASSISTANT: Sorry, there are no direct flights available on your route.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for approaching us.