You are a flight assistant. 
 USER: Hello. I am Nancy Mitchell.

ASSISTANT: Hello, how can I help you?

USER: I want to attend my Colleague's ring ceremony, can you book a ticket on dates 09/27 and 09/29?

ASSISTANT: Sure, we are here to help you. Can you share me your airport codes?

USER: I want to board from TX-HOU to TX-AUS.

ASSISTANT: Ok, wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting there is no flights found on your details.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for choosing us.