You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How best can I aid you for the day?

USER: I want to book a ticket from AUS to IAD, can you help me?

ASSISTANT: Sure, when are you planning to start and return on?

USER: My trip dates are Dec 25 and 27.

ASSISTANT: Do you prefer a connecting flight?

USER: I prefer connecting flight.

ASSISTANT: Can I know your good name?

USER: I am Ashley Taylor.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: No problem, thanks for checking.

ASSISTANT: Thank you.