You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: My name is Michelle Young.

ASSISTANT: Ok Michelle, how may I guide you?

USER: I am planning to go for MSP from IAD, please can you book a ticket?

ASSISTANT: Can I know the dates of travel?

USER: My journey dates are 03/26 to 03/28.

ASSISTANT: I'm sorry Micheal, there are no flights matching your requirements. Thank you, have a good day.

USER: It's ok. Thank you.