You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Micheal Adams this side.

ASSISTANT: Yes Adams.

USER: I have a plan to buy a new house in New York, can you please help me in booking a flight ticket?

ASSISTANT: Sure Adams, I am here to book a flight. Can you please provide me your travelling dates?

USER: These are my travelling dates 03/21 and 03/23.

ASSISTANT: Ok, may I know your airport codes?

USER: My airport codes are DTW to EWR.

ASSISTANT: Sorry, there is no flight is available for your requested dates.

USER: It's ok, no problem.

ASSISTANT: Ok.

USER: Thank you for your information.

ASSISTANT: Welcome. Thank you for choosing us.