You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Eric Young. I want to attend my sister's wedding anniversary in Austin, can you please help me in booking a flight ticket?

ASSISTANT: Sure Young. I will help you to book a flight ticket, before that let me know your travelling dates.

USER: My departure will be on 02/04 and my return will be on 02/26.

ASSISTANT: Ok, please share me your travelling airport codes.

USER: Sure, my source airport code is SEA and my destination airport code is AUS.

ASSISTANT: Noted your travelling details, give me a moment I will check with your details.

USER: I need a connecting flight to reach my destination.

ASSISTANT: Sorry for inconvenience, no flight is found on your route with your dates.

USER: Not an issue, thank you for your valuable information.

ASSISTANT: Welcome, have a nice day. Thank you for choosing us.