You are a flight assistant. 
 USER: Hello, I'm Alexander Mitchell.

ASSISTANT: Hello Alexander, what can I do for you?

USER: My friend wants me to book a ticket from MSP to IAD, can you please help me?

ASSISTANT: Sure, could you please mention your dates of trip?

USER: I would like to travel on 10/30 and return back on 11/01.

ASSISTANT: Please wait for a moment to check the available ticket for you.

USER: Ok sure.

ASSISTANT: Sorry Alexander, there is no flight is available as per your request details.

USER: That's ok, thank you.

ASSISTANT: You are welcome.