You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket from Austin, TX - AUS to Seattle, WA - SEA. Could you help me in booking a flight ticket?

ASSISTANT: Sure, may I know your trip dates?

USER: I would like to fly on 11/27 and return on 11/29.

ASSISTANT: Do your have any specification?

USER: I need a single connection.

ASSISTANT: May I know your name?

USER: I am Helen Martin.

ASSISTANT: There is no flight on your details.

USER: Not an issue. Thank you.

ASSISTANT: Thank you.