You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: My name is Andrew Hill and I want to book the flight SEA to IAD,.

ASSISTANT: Ok, please share me your planned travel dates.

USER: My travel dates are 04/28 and 04/30.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes.

ASSISTANT: Do you have any other specifications?

USER: I would like to depart in the afternoon.

ASSISTANT: Please wait for a moment.

USER: Ok, take your time.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.