You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Richard Johnson here.

ASSISTANT: Johnson, how may I help you?

USER: I am a magician, I would like to do magic show at New York. Please help me in booking a ticket from DTW to LGA.

ASSISTANT: When you are willing to travel?

USER: Ok, my planned trip dates are 11/10 and 11/12.

ASSISTANT: Sure, please wait for a while.

USER: Ok, take your time.

ASSISTANT: Sorry to inform, that no flight is available on your preferred dates.

USER: Ok, no problem. Thank you.

ASSISTANT: You are welcome, thank you very much.