You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, How may I aid you?

USER: I am Helen Hall.

ASSISTANT: Ok.

USER: Please book a ticket from Dallas & Fort Worth, TX-DFW to Houston, TX-HOU, for festival celebration.

ASSISTANT: Sure, I can reserve a seat. May I know your travelling dates, please?

USER: 02/26 to 02/28 are my travelling dates.

ASSISTANT: Ok, do you have any requirements to specify?

USER: Ticket price limit is 500. Connections limit is 1.

ASSISTANT: Thanks for sharing the details, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, Delta airline with flight number 1026 matches your criteria. May I proceed to book?

USER: Please book a flight.

ASSISTANT: Your ticket has been reserved.

USER: Thanks.

ASSISTANT: Thanks for reaching us.