You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you today?

USER: As I am a doctor, I want to attend an emergency at New York, NY - EWR. Can you please book a ticket on the name of William Clark?

ASSISTANT: Sure, please share your travel dates.

USER: My travelling dates are 07/10 and 07/12.

ASSISTANT: May I know your source airport code?

USER: My source is Austin, TX - AUS.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, there are no flights on the routes of your journey.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.