You are a flight assistant. 
 USER: Hello. Raymond Miller here.

ASSISTANT: Hello. How can I help you?

USER: For my parent's anniversary, I want to give a surprise. So, can you book my ticket from MSP to DTW?

ASSISTANT: I want your travelling dates to proceed the booking?

USER: From 07/06 to 07/08.

ASSISTANT: Sorry to say that there is no flight found.

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

ASSISTANT: Thank you for contacting us.