You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: I would like to book a ticket on 06/30 to meet my manager at Washington, DC-DCA regarding our new project. Can you help me out?

ASSISTANT: Sure, I am here to aid you.

USER: Thank you.

ASSISTANT: May I know your source and return date?

USER: Sure, I will start from Seattle, WA-SEA and return back on 07/02.

ASSISTANT: Ok, may I know your name please?

USER: Sure, my name is Sandra Martinez.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for your time. Sorry, no flights were found based on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.