You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am looking for a direct flight from IAD to MSP, can you please search and book the flight ticket for me?

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

USER: Sure, I will depart on 11/05 and also please book my return ticket on 11/07.

ASSISTANT: May I know your name?

USER: My name is Helen Collins.

ASSISTANT: Sorry, there is no flight available for you.

USER: Not an issue, anyway thank you very much for checking.

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