You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Karen Thomas.

ASSISTANT: How can I help you today?

USER: I am planning to meet my childhood friend in Austin, so please help me in booking a flight ticket.

ASSISTANT: Sure. May I know your airport codes?

USER: My source is Minneapolis, MN - MSP and destination code is TX - AUS.

ASSISTANT: To proceed booking I need your travelling dates.

USER: I want to fly on 01/18 and return on 01/20.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights found on your given requirements.

USER: Not an issue. Thank you.

ASSISTANT: Thank you.