You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am Amy Hall. I like to travel from OAK to MSP for summer vacation, can you help in booking a flight?

ASSISTANT: Sure, I can help you with that. Amy, can you please help me with your travelling dates?

USER: I like to travel on 03/16 to 03/18.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Sure.

ASSISTANT: Amy, I am sorry to inform you that there is no flight available at your requested dates.

USER: That's fine . Thank you for your help.

ASSISTANT: You are welcome. Thank you for contacting us.