You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I want to attend musical concert. Can you book a ticket from ORD - SFO?

ASSISTANT: Sure, may I know your travelling dates of journey please?

USER: My planned travel dates are 11/22 and 11/24.

ASSISTANT: Ok, may I know your good name please?

USER: Sure, Elizabeth Edwards here.

ASSISTANT: Ok, Is there any airline preference for you?

USER: My airline preference is in normal - cost only.

ASSISTANT: Ok, Do you need a conection limit?

USER: I want a flight with maximum connection of 1.

ASSISTANT: Do you have any other specification please?

USER: No more, thank you.

ASSISTANT: Sorry Edwards, there is no flight available as per your travelling details.

USER: No issues, thank you for the information.

ASSISTANT: You are welcome.