You are a flight assistant. 
 USER: Hi , I am Timothy Thompson.

ASSISTANT: Hello. How can I address you?

USER: I would like to head from New York, NY - LGA on 03/11 to Detroit, MI - DTW to give a seminar. Can you help me with that?

ASSISTANT:  Sure, Could you please let me know your return date?

USER: It should be on 03/13.

ASSISTANT: Please wait a while I will check and get you back.

USER: Sure.

ASSISTANT: Thanks for being waiting. There is a airline that matches your requirement.

USER: Please make sure it is a direct flight.

ASSISTANT: OK. Unfortunately, there are no flights found.

USER: Ok, thank you for your service.

ASSISTANT: Thank you for contating us.