You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Andrew Garcia here.

ASSISTANT: How could I aid you today?

USER: Can you book a flight ticket in normal-cost airline for my business trip to Boston?

ASSISTANT: Sure, may I know your trip dates please?

USER: The travel dates are from 12 Dec to 14 Dec.

ASSISTANT: Do you have any other requirements?

USER: I am looking for a single connecting flight.

ASSISTANT: Can you please share me your airport codes?

USER: Yes, my airport codes are from AUS to BOS.

ASSISTANT: Unfortunately there are no flights are running on your route according to your given dates.

USER: Ok, that is not a problem.

ASSISTANT: Thank you for opting us.

USER: Thank you.