You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Steven Allen.

ASSISTANT: How may I help you?

USER: I am looking to book a flight ticket to meet my friend in Seattle. Can you help me for booking a flight ticket from AUS to SEA?

ASSISTANT: Steven Allen, I am here to help you for this. Could you please share me your travel dates?

USER: My travelling dates are Dec 16 and Dec 18.

ASSISTANT: Do you prefer any airlines?

USER: Any airline is fine for me.

ASSISTANT: At which time your are willing to depart and return time?

USER: My departure time is afternoon and return time is morning.

ASSISTANT: Do you have any other specifications?

USER: I need a single connecting flight.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you very much for approaching our agency.

USER: Welcome.