You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello. How can I serve you?

USER: Please book a ticket from Houston, TX-IAH to Atlanta, GA-ATL.

ASSISTANT: Sure. May I know your good name?

USER: I am Karen Taylor.

ASSISTANT: Let me know your trip dates.

USER: Travel dates are from 10/28 to 10/30.

ASSISTANT: Please, wait.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no flight found on your given requirements.

USER: Thank you.

ASSISTANT: Thank you.