You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you today?

USER:  I am Robert Green. I want to fly from TX-IAH to meet my friends. Can you book  a ticket from TX-AUS?

ASSISTANT: Sure, can I know your dates of journey please?.

USER: My journey dates are 11/19 and 11/21.

ASSISTANT: Do you have any connection limit?

USER: I need a connection flight.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there is no flights found on your given details.

USER: Ok, thank you for your response.

ASSISTANT: Thanks for choosing us.