You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: My name is Nancy Jackson, I want to book a flight from SFO to visit MSP for vacation. Can you help me with booking?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: I will travel on May 1st and return on May 3rd.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: Ok, thank you for the information.

ASSISTANT: You are welcome, have a great day.