You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Anthony Green here.

ASSISTANT: Green, how may I help you?

USER: I want to meet my uncle as he is unwell, can you please help me to book my flight ticket from EWR to DFW?

ASSISTANT: Please provide your travel dates.

USER: Sure, my trip dates are 02/19 and 02/21.

ASSISTANT: Please hold on for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, no flight is found.

USER: Thank you so much.

ASSISTANT: Thank you for contacting us.