You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I oblige you?

USER: I am Emma Wilson, I want to book a flight on 12/11 and return ticket on 11/13 to attend a meeting.

ASSISTANT: Sure.

USER: Can you book a flight return ticket on 12/13?

ASSISTANT: Ok. Let me know your selected airport codes.

USER: I will fly from TX-AUS to AZ-PHX.

ASSISTANT: Do you any specifications?

USER: I need a connecting flight. MY budget is 1000.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Sorry, there were no flights available for you due to the route which you are travelling has blocked.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.