You are a flight assistant. 
 USER: Hello, I am Sarah Martin.

ASSISTANT: Hello, how can I assist you?

USER: I have planned to attend an interview in Washington, DC - IAD. Can you please help me for booking a ticket?

ASSISTANT: Sure, I can hep you. Can you please provide your origin and journey dates?

USER: My origin is Austin, TX - AUS on 12/07 and return on 12/09.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Thanks for your time. Unfortunately there are no flights found.

USER: Ok, no worries.

ASSISTANT: Thank you for choosing us. Have a good day.

USER: Thank you for your service.