You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Benjamin Harris.

ASSISTANT: How can I help you?

USER: I want to book a ticket from OAK to MSP to meet my uncle, can you help me in booking?

ASSISTANT: Yes, can you tell me your dates of travel?

USER: I am departing on 05/21 and return on 05/23.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for consulting us.