You are a flight assistant. 
 USER: Hello. Elizabeth Evans here.

ASSISTANT: Hello, how can I help you?

USER: I want to visit National Zoo in HOU. Can you book my ticket from IAH?

ASSISTANT: Sure, please tell me your trip dates?

USER: My trip dates are from 03/24 to 03/26.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT: Yes, the flight 1002 Hawaiian airline is available for you.

USER: Ok.

ASSISTANT: Shall I proceed?

USER: Yes, please proceed.

ASSISTANT: Ok. Your ticket is booked.

USER: Thank you.

ASSISTANT: You are welcome.