You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name please?

USER: I'm Nicholas Walker.I'm staying in MI - DTW.I have planned a vacation to go with my family in NV - LAS.

ASSISTANT: Can you please tell me your travelling dates?

USER: My vacation is on 06/01. And I want start from DTW on 05/30.

ASSISTANT: Sorry to say, no flights found on your details.

USER: OK.Thank you for your kind information.

ASSISTANT: Thank you for contacting us.