You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can assist you at this moment?

USER: I am Richard White.

ASSISTANT: Nice to meet you Richard.

USER: I am planning to visit New York for a small trip, as these are few last days of mine left in USA, going back to India, can you please help me while booking a ticket from DTW to OAK?

ASSISTANT: Sure, I am happy to help you. Do you planned about dates of travel?

USER: My preferable dates are 04/24 to 04/26.

ASSISTANT: Ok, please give me a moment to find a flight for you. Thank you for waiting.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, no flight is free on your travel dates.

USER: That's really sad for me. Thank you for your service.

ASSISTANT: My pleasure. Thank you for choosing us. Have a great day.