You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Angela Baker.

ASSISTANT: How may I aid you?

USER: I want to travel from BOS to MSP. Can you book a flight ticket for me?

ASSISTANT: Sure, I am here to help you. Could you please share your travelling dates?

USER: I want to travel on 08/20 and 08/22.

ASSISTANT: Sorry, no flight is available for you.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for choosing us, have a nice day.