You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you please book a flight ticket from IAD to PHL to attend a meeting in Philadelphia?

ASSISTANT: Sure, please share your journey dates?

USER: My journey dates are on Jan 13th and 15th.

ASSISTANT: Do you have any specifications?

USER: I prefer a flight with single connection.

ASSISTANT: Is there any class preferences?

USER: Any class is ok for me.

ASSISTANT: May I know your good name?

USER: My name is Samantha Phillips.

ASSISTANT: Sorry, no flights found on your given details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.