You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Yes there is a concern for which I need your help to book a flight from EWR to DEN?

ASSISTANT: Sure, can you please share your travel dates?

USER: Ok, please book for the dates 05/26 and 05/28.

ASSISTANT: May I know your name to proceed further?

USER: Ok, book a flight ticket on the name Michelle Phillips.

ASSISTANT: I am sorry to inform you that there is no flight available at your request.

USER: Ok, not a issue. Thank you for assisting me.

ASSISTANT: Thank you for contacting us.