You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: Please book a ticket to Chicago, IL-ORD from Houston, TX-HOU.

ASSISTANT: Ok, please may I know your travel dates to book?

USER: Depart is by 02/07 and will return on 02/09.

ASSISTANT: Thank you for waiting. Sorry to say there is no flight available at your preferred dates.

USER: Thanks.

ASSISTANT: Thank you for connecting with our agency. Please may I know your name?

USER: I am Margaret Taylor.

ASSISTANT: Thank you for providing the details.