You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Carol Gonzalez here. I am planning to meet my friend in Austin, AUS. Can you please help me with booking a flight ticket from DCA?

ASSISTANT: Ok, may I know your travelling dates?

USER: My travelling dates are from July 12 to July 14.

ASSISTANT: Ok, do you have any other requirements?

USER: I need a direct flight in my journey.

ASSISTANT: Ok, please wait.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no flights found on your route.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.