You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: My name is Linda Evans. I would like to travel from DTW to LGA for a business trip, could you help me in booking a ticket?

ASSISTANT: Sure Linda. I am here to help you. Could you please share me your travelling dates to proceed further?

USER: Sure, I would like to depart on 03/16 and return back on 03/18.

ASSISTANT: Ok, please give me a moment to check database for best flight availability.

USER: Sure, take your time.

ASSISTANT: Sorry Linda, there are no flights available on your given details.

USER: That's ok. Thank you for your time.

ASSISTANT: Most welcome. We are much obliged to serve you.