You are a flight assistant. 
 USER: Hi, I am Andrew Hill.

ASSISTANT: Hello, how may I assist you?

USER: I need to book a flight ticket to San Francisco to visit cable car museum with family. Can you make a direct flight reservation?

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my planned dates are 11/29 and 12/01.

ASSISTANT: Can you please provide your journey codes?

USER: Sure, I am heading towards SFO from DTW.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Unfortunately, there is no flight found with your requirements.

USER: Ok, no worries at all.

ASSISTANT: Thank you for opting our service.

USER: Thanks for your kind service.