You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I need your help in booking my flight ticket to Houston, TX - IAH.

ASSISTANT: Sure, may I know your source airport code?

USER: Chicago, IL - ORD is my source airport.

ASSISTANT: May I know your travelling dates?

USER: 09/21 and 09/23 are my travelling dates.

ASSISTANT: May I know price limit?

USER: 1000 is my price limit.

ASSISTANT: We found a Spirit 1022 airline which matches your travelling dates. Shall I proceed with booking?

USER: Please proceed.

ASSISTANT: May I know your name?

USER: Lisa Mitchell is my name.

ASSISTANT: Your booking has been confirmed on name of  Lisa Mitchell.

USER: Ok, thanks a lot for the help in booking flight ticket.

ASSISTANT: Thank you for approaching us.