You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Brenda Hernandez.

ASSISTANT: Brenda, how may I assist you at this moment?

USER: Book a ticket from ORD to MSP, to meet my brother to celebrate his wedding anniversary.

ASSISTANT: Sure, I am glad to help you in booking, please share your travelling dates?

USER: Sure, my travelling dates should be 02/01 and 02/03.

ASSISTANT: Sorry for the inconvenience, no flights as per your details.

USER: It's ok, thanks for your service.

ASSISTANT: It's my pleasure.