You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit Los Angeles with my friends. Can you help me to book a ticket?

ASSISTANT: Sure, please share me your travelling dates?

USER: My trip dates are 01/17 and 01/19.

ASSISTANT: Kindly assign me your airport codes?

USER: My airport codes are AUS-LAX.

ASSISTANT: May I know your name?

USER: David Gonzalez here.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights with your specifications.

USER: No issue, Thanks for the information.

ASSISTANT: Thank you for reaching us.