You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Matthew Smith. I would like to travel to New York for a business meeting. Can you help me in booking a ticket from DTW to EWR?

ASSISTANT: Sure Smith, I am here to help you. When you are willing to travel?

USER: My planned journey dates are 07/13 and 07/15.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Smith sorry to intimate, no flights are found on your prefer dates.

USER: It's ok, thank you for the information.

ASSISTANT: You are welcome.