You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Please book a ticket from Houston, TX-IAH to Charlotte, NC-CLT for science festival.

ASSISTANT: Sure, let me know your travelling dates.

USER: My travelling dates are from 03/05 to 03/07.

ASSISTANT: Please share your specifications.

USER: Price limit 1000. Connections limit 1.

ASSISTANT: May I know your name?

USER: I am Stephen Wright.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights available based on your details.

USER: Thanks.

ASSISTANT: Thank you for choosing us.