You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to travel from PHL to Seattle. Can you please search a flight for me?

ASSISTANT: Sure, may I know your trip dates please?

USER: My trip dates are from 06/28 to 06/30.

ASSISTANT: Ok, do you have any other requirements?

USER: I want to book to my ticket in the economy class and also I want a single connection.

ASSISTANT: Well, can I know your name please?

USER: My name is Sandra White.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: That's fine, thank you.

ASSISTANT: My pleasure.