You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Will you help me in booking the flight ticket IAD to AUS?

ASSISTANT: May I know your travelling dates please?

USER: My journey dates are 11/08 and 11/10.

ASSISTANT: May I know you name please?

USER: Myself Betty Miller.

ASSISTANT: I am sorry no flights found on your route.

USER: Ok, not an issue.

ASSISTANT: Thank you for choosing us.

USER: Thank  you for your information.