You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Thompson.

ASSISTANT: How can I assist you today?

USER: I am looking to book a flight ticket from BOS to ATL, can you please help me out?

ASSISTANT: Sure, I will help you to book a flight. Can you please share me your travelling dates?

USER: My trip dates are from 05/17 till 05/19.

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, I will choose any other way to reach my destination on time. Anyway thank you for your information.

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

USER: Welcome.