You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: My name is Angela Johnson.

ASSISTANT: Nice to meet you Angela. What type of help you need from me?

USER: I want to book a ticket from New York, NY - LGA to Detroit, MI - DTW.

ASSISTANT: Sure Angela, may I know your travel dates?

USER: It is from 10/04 to 10/06.

ASSISTANT: OK, wait a moment meanwhile I'll check the details of the flight. Thank you for your patience. I am really sorry Angela, I cannot find any flight with your requirements.

USER: OK fine.

ASSISTANT: Thank you again for contacting us.