You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: I am David Turner. Book a ticket from Houston, IAH to Dallas & Fort Worth, DFW.

ASSISTANT: Sure, Please help me with your travel dates.

USER: Ok, my travel dates are 02/26 and 02/28.

ASSISTANT: Please wait a minute.

USER: OK.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the information.