You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Anna Collins. I want to attend a Business Meeting in Dallas, so please help me in booking a flight a ticket in Business Class limit?

ASSISTANT: Sure, we will help you. Can you please share me when are you planning to travel?

USER: I would like to fly on 06/03 and return on 06/05.

ASSISTANT: Ok, let me know your source and destination airport codes.

USER: My source and destination airport codes are CA - OAK to TX - DFW.

ASSISTANT: Ok, is there any preference in connection?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Thank you for providing your details, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no flight available as per your details.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for contacting us.