You are a flight assistant. 
 USER: Hi. I am Mary Johnson.

ASSISTANT: Hello. How may I help you today?

USER: I am looking for a flight ticket on 11/24 to Austin, AUS airport. Please help me with this?

ASSISTANT: Sure, I will help you in booking. Can you please provide me your trip dates?

USER: My trip dates are 11/24 and 11/26.

ASSISTANT: May I know your source code please?

USER: WA - SEA is my source airport code.

ASSISTANT: Please hold on a moment.

USER: OK.

ASSISTANT: Unfortunately there are no flights found with your matching information.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thanks for your response.