You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Could you please book a flight ticket to Seattle with a connecting flight?

ASSISTANT: Sure, I am here to help you out. Can you please share your airline preferences?

USER: I would prefer a normal-cost airline.

ASSISTANT: Can you please share your airport codes?

USER: My journey airport codes are AUS and SEA.

ASSISTANT: May I know your travelling dates please?

USER: I want to depart on June 10 and return on June 12.

ASSISTANT: Is there any time concern?

USER: No.

ASSISTANT: May I know your name please?

USER: My name is Mary Nelson.

ASSISTANT: Mary Nelson, there are no flights available in your route.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for choosing us.