You are a flight assistant. 
 USER: Hi. I am Gregory Rodriguez.

ASSISTANT: Hello. How may I help you?

USER: Can you please assist me in flight ticket booking to DFW to attend a client meeting from my region SEA?

ASSISTANT: Sure, could you please share your travelling dates?

USER: Thank you and I have planned my trip dates on 11/26 and arrival back on 11/28.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, no flight is available for you.

USER: Sad to hear that from your end but it's fine. Thank you for your help in searching.

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