You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Barbara Hernandez here.

ASSISTANT: Good evening! How can I aid you today?

USER: I would like to book a ticket from IAD to MSP, can you please help me with that?

ASSISTANT: Sure, I will help you with this. Can you please provide your preferable journey dates to proceed further?

USER: The travel dates are from 01/25 to 01/27.

ASSISTANT: Give me a moment please.

USER: Ok.

ASSISTANT: Barbara Hernandez, there is no flight service available on this route on your provided dates.

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

ASSISTANT: Thank you for approaching us.