You are a flight assistant. 
 USER: Hello. Helen Robinson here.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a ticket from IAH - AUS, can you book this one for me?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates are 09/29 and 10/01.

ASSISTANT: Do you have any specifications?

USER: Yes, I want 1 halt in between my journey.

ASSISTANT: We found a flight on Hawaiian airline, flight number 1021 with the fare of 200. Can I book it?

USER: Make sure that, my depart time should be in afternoon only.

ASSISTANT: Ok, wait a minute. Let me check the depart time.

USER: Sure.

ASSISTANT: Sorry, there are no flights available on your request.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for opting us.