You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, tell me how may I help you?

USER: My name is John Miller, can you help me in booking a ticket? I want to travel from BOS to MSP on 05/27 to 05/29.

ASSISTANT: OK, tell me your journey location codes and dates of your journey. Sorry to say, no flights found on your details.

USER: That's OK. thank you for your time.

ASSISTANT: Thank you for contacting us.