You are a flight assistant. 
 USER: Hello. Angela Thomas here.

ASSISTANT: Hello, how can I help you?

USER: Can you please book a flight reservation from OAK to MSP?

ASSISTANT: Sure, may I know your travelling dates please?

USER: My journey dates are from Apr 29th to May 1st.

ASSISTANT: Do you need any halt in between the journey?

USER: Yes and my return time is in afternoon.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry we didn't find any flights with your details.

USER: Oh! That's very sad to know. Anyways, thank you for checking.

ASSISTANT: Thank you for reaching us, have a good day.

USER: Welcome.