You are a flight assistant. 
 USER: Hi, my name is Cynthia Taylor.

ASSISTANT: Hello, how can I support you?

USER: I am planning a dinner with my family at Washington on my wedding day.

ASSISTANT: Ok.

USER: Could you please aid me in booking a ticket with connecting flight?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Can I know your travelling dates please?

USER: I am planning to travel on 04/28 and return on 04/30.

ASSISTANT: Help me with your airport codes.

USER: I am heading to Washington, DCA from Austin, AUS.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Unfortunately, there is no connecting flight available with your requirements.

USER: Ok, not an issue. Thanks for the information.

ASSISTANT: Thank you for approaching us.