You are a flight assistant. 
 USER: Hello, I am Jerry Williams.

ASSISTANT: Hello, how can I help you?

USER: Can you please book me a flight ticket from Washington, DC - IAD?

ASSISTANT: Sure, may I know your travelling dates?

USER: My preferable dates are 12/09 and 12/11.

ASSISTANT: May I know your destination code?

USER: My destination is Houston, TX - IAH.

ASSISTANT: Please mention your price limit?

USER: 200 is my price limit.

ASSISTANT: There is a Spirit 1018 airline which matches your travelling dates. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: Your booking has been confirmed on name of Jerry Williams.

USER: Thanks for reserving my ticket.

ASSISTANT: Thank you for approaching us.