You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I want travel from CA-OAK to TX-AUS, can you please book a ticket?

ASSISTANT: Sure, I will book a ticket. May I know your price limit?

USER: My price limit is 1000 with single connection.

ASSISTANT: Ok, may I know your good name please?

USER: I am David Turner.

ASSISTANT: On which dates you want to travel?

USER: My travel dates are from 04/02 to 04/04.

ASSISTANT: Please be on hold. I will check the availability of flights and get back to you.

USER: Ok.

ASSISTANT: Thanks for holding on. Sorry for the inconvenience, there were no flights available with your given details.

USER: Ok, no issue.

ASSISTANT: Thanks for contacting us, hope to serve you again.

USER: Thank you for information.