You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I guide you?

USER: I am Ryan Roberts. Can you help me in booking from DFW to HOU?

ASSISTANT: May I know your journey dates to search a flight?

USER: I will fly on 10/01 and return on 10/03.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no flight as per your details.

USER: No issue, thank you for your time.

ASSISTANT: Thank you for choosing us, have a nice day.