You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Nancy Martinez. Can you help me in booking my flight ticket Minneapolis MSP to Houston HOU.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My travelling dates will Feb 26 to Feb 28.

ASSISTANT: Sorry, there are no flights found.

USER: That's ok, Thank you.

ASSISTANT: Thank you for reaching us.