You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sandra Hernandez.

ASSISTANT: How can I help you?

USER: Please search a flight ticket from MSP to IAD?

ASSISTANT: May I know your travelling dates please?

USER: My travelling dates are 04/30 and 05/02. I need Direct flight, please search with that.

ASSISTANT: I am sorry no flights found on your dates.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you.